★ 4.8 / 5
from 990 verified reviews on G2, Capterra and Trustpilot
Mailspring Converter Migrate Emails
PCDOTS Mailspring Converter Software exports Mailspring emails and contacts to 15 destinations including PST, MBOX, EML, MSG, PDF and direct cloud delivery to Gmail, Office 365, Yahoo and IMAP. Auto-detects the configured Mailspring profile, with manual folder pick for orphaned data. Headers, attachments, signatures and folder tree all carry through, no Mailspring install required.
Why Switch From Mailspring and How the Wizard Helps
Mailspring ships without a built-in export feature (open feature request since 2019). Users switching to Outlook, Gmail or Office 365, or needing a PST or MBOX backup, hit the gap and look for a converter. The PCDOTS Mailspring Converter Software fills it: load the profile, pick a destination, click Convert. Output spans 15 file and cloud destinations with hierarchy, attachments and threading intact.
Fifteen Output Formats From a Single Mailspring Load
One Mailspring profile load yields any of fifteen outputs. Email file formats: PST (per-account or merged), MBOX, EML, MSG, EMLX. Document formats: PDF, PDF/A for legal e-discovery, HTML, CSV, TXT, RTF, DOC. Live cloud and IMAP: Gmail, Microsoft 365, Yahoo, generic IMAP, Exchange Server, Hosted Exchange.
Live cloud delivery: Gmail, Microsoft 365, Yahoo, IMAP, Exchange
Bulk Conversion With Folder and Field Filters
Process every connected Mailspring account in one job, or scope to a folder subset. Filter rules apply across To, From, Cc, Bcc, Subject, Body, Date range, Has-Attachment. Use date filters for historical archival, sender filters for vendor threads, subject filters for project mail.
Bulk batch mode: every connected Mailspring account in one pass
Filter rules: To, From, Cc, Bcc, Subject, Body, Date, Attachment
Click any message to render it in the preview pane before conversion. Verify body, attachments, headers, signature, inline images. The same retention applies through conversion: To, Cc, Bcc, Subject, Body, Signature, Inline images, Read/Unread state, Folder hierarchy, Threading all transfer unchanged to the destination.
Folder hierarchy and threading carry through to destination
Auto-Detect Configured Mailspring Account
On Windows machines with Mailspring installed, the wizard auto-discovers the configured Mailspring profile and lists every connected account: name, email address, IMAP host, message count. No manual path entry, no command line, no technical knowledge required. Click the account, click Convert.
Manual Folder Pick for Orphaned Mailspring Data
Mailspring profile copied off another machine, or the Mailspring app uninstalled? Use the manual folder picker. Browse to the Mailspring data folder, the wizard reads the profile, lists folders, and runs the conversion identically to the auto-detect path. Mailspring app installation is not required.
Mailspring Contacts Export to vCard and CSV
Mailspring stores contacts in a separate location from mail. The wizard exports contacts to vCard (.vcf) for use in Outlook, iPhone, Gmail Contacts, or any standards-compliant address book; or to CSV for spreadsheet processing. Name, email, phone, organization, notes all retained.
Direct Cloud Migration Without Intermediate Files
Skip the file-export step entirely. Authenticate to the destination cloud account (Gmail, Microsoft 365, Yahoo, IMAP) via OAuth or app-specific password and the wizard streams Mailspring messages directly into the destination mailbox. Folder structure recreated on the destination server, attachments uploaded inline.
Folder Hierarchy and Threading Carried Through
Mailspring folder layout (Inbox, Sent, Drafts, Spam, Trash, Custom labels, sub-folders) recreates exactly in the destination format. Threading metadata maps to PST conversation threading, MBOX X-Thread headers, IMAP THREAD extension. Read/unread state, starred flags, and snooze timestamps all retained.
Standalone Windows Tool, No Mailspring Required
Runtime requirement is a Windows machine with .NET Framework 4.5 or later. The wizard does not need the Mailspring application installed, does not require an internet connection (for file output formats), and does not require any third-party software. Reads the Mailspring data directly.
8K+Mailspring profiles tested
15Output destinations supported
99.5%Mailspring conversion success
990Verified user reviews
Simple 3-Step Process
Mailspring to Any Format in Three Stages
Three-stage workflow regardless of where the Mailspring mail is heading: load the Mailspring profile, preview and select what to migrate, export to a destination format or live cloud account. The eleven-step walkthrough later on this page covers Mailspring-specific configuration, including auto-detect vs manual folder pick, account scoping, and credentials passthrough for live cloud destinations.
01
1. Load Your Mailspring Profile
The wizard auto-detects the configured Mailspring profile on Windows and lists every connected account. For orphaned data or profiles copied off another machine, use the manual folder picker. Auto-detect is the default; manual path takes seconds.
02
2. Preview and Select Mailspring Mail
Pick which connected accounts and folders to convert. Click any message to render it in the preview pane and verify content, attachments and headers. Apply optional filters across To, From, Subject, Date or Has-Attachment to scope the conversion job.
03
3. Export to File Format or Cloud Account
Three categories. Email file formats: PST, MBOX, EML, MSG, EMLX. Document formats: PDF, PDF/A, HTML, CSV, TXT, RTF, DOC. Live cloud and IMAP: Gmail, Microsoft 365, Yahoo, IMAP, Exchange Server, Hosted Exchange.
Software Compatibility
Mailspring Source Coverage and Output Destinations
Source coverage: Mailspring profiles from Mailspring 1.0 through 1.19 (current 2026 release), including profiles copied from Mac or Linux Mailspring installs. Destination coverage: 15 outputs spanning email file formats (PST, MBOX, EML, MSG, EMLX), document formats (PDF, PDF/A, HTML, CSV, TXT, RTF, DOC), and live cloud or IMAP destinations (Microsoft 365, Workspace, Yahoo, iCloud, generic RFC 3501).
Input File Formats / Servers
Specialized and Tested Across Every Common Email Source
The Mailspring converter for Windows reads Mailspring profiles from auto-detect or manual folder pick, including profiles copied off Mac or Linux machines. Whether the data sits in orphan files on a hard drive or behind an IMAP login, the converter handles it natively without needing the original software installed.
Browse the full list of input file Mailspring profile sources and the output destinations the Mailspring converter wizard reads and writes.
Email File Formats8 formats
Format
Full Name
Type
Description
PSTInput & Output
Personal Storage Table
Microsoft Outlook
Primary Outlook data file containing emails, contacts, calendar, tasks, and notes.
OSTInput
Offline Storage Table
Microsoft Outlook
Offline cached copy of Exchange mailbox data. Supports inaccessible or orphaned OST files.
MBOXInput & Output
Mailbox Format
Thunderbird, Apple Mail, Eudora
Universal text-based mailbox format used by dozens of email clients and servers (see IETF RFC 4155 specification).
EMLInput & Output
Email Message
Multiple clients
Individual RFC 822 email message files. Widely supported by Windows Mail, Outlook Express, and others.
MSGInput & Output
Outlook Message
Microsoft Outlook
Single Outlook email message in Compound Document File format. Preserves all metadata.
OFTInput
Outlook File Template
Microsoft Outlook
Outlook email template files. PCDOTS converts OFT templates to any supported format.
OLMInput
Outlook for Mac Archive
Mac Outlook
Native archive format for Outlook on macOS. Contains emails, contacts, and calendar data.
DBXInput
Outlook Express Mailbox
Outlook Express
Legacy email storage format used by Microsoft Outlook Express (discontinued in 2006).
Desktop Email Clients9 clients
Email Client
Platform
Storage Format
Conversion Support
Microsoft Outlook
Windows / Mac
PST, OST, OLM
Full: emails, contacts, calendar, tasks, notes, attachments
Mozilla Thunderbird
Windows / Mac / Linux
MBOX
Full: all folders, subfolders, attachments, filters
Mailbird
Windows
Local Database / MBOX
Full: all mailbox data including multiple accounts
eM Client
Windows / Mac
Local Database
Full: messages, contacts, calendar, attachments
Mailspring
Windows / Mac / Linux
Local Profile / MBOX
Full: all email data and account configurations
Postbox
Windows / Mac
MBOX
Full: Thunderbird-compatible MBOX format
Windows Live Mail
Windows
EML + WLMX
Full: all message folders and account data
Eudora
Windows / Mac
MBX (MBOX variant)
Full: legacy Eudora mailbox files
IceWarp
Windows / Linux
Proprietary
Full: direct IceWarp server data export
Cloud & Webmail Services7 services
Service
Type
Direction
Auth Method
Gmail / Google Workspace
Cloud Webmail
Input & Output
OAuth 2.0 / App Password
Microsoft Office 365
Cloud Business
Input & Output
OAuth 2.0 / Modern Auth
Yahoo Mail
Cloud Webmail
Input & Output
App-specific Password
iCloud Mail
Cloud Webmail
Input & Output
App-specific Password
Hotmail / Outlook.com
Cloud Webmail
Input & Output
OAuth 2.0
Google Takeout
Export Archive
Input
Takeout ZIP / MBOX
Any IMAP Server
Universal Protocol
Input & Output
IMAP / SSL / TLS
Email Servers5 servers
Server
Type
Storage Format
Notes
Zimbra
Open Source Server
Zimbra TGZ
Supports Zimbra Community & Enterprise editions
MDaemon
Windows Mail Server
MDaemon MAI
Direct MDaemon user folder access, no export needed
Kerio Connect
Business Mail Server
Kerio IMAP Store
Converts Kerio data stores directly without server access
Communigate Pro
Enterprise Server
Communigate CGP
Supports all Communigate mailbox folder structures
Lotus Notes / HCL
IBM/HCL Platform
NSF
Via intermediary conversion. Contact support for enterprise plans.
Output Destinations13 outputs
Output Format
Category
Best Used For
PST
Email File
Importing into Microsoft Outlook on any Windows PC
MBOX
Email File
Thunderbird, Apple Mail, Postbox, or any MBOX-compatible client
EML
Email File
Windows Mail, individual email archiving, or web uploads
MSG
Email File
Saving individual Outlook messages with full metadata
PDF
Document
Legal archiving, compliance, sharing non-editable email records
HTML
Document
Web-based email viewing, readable in any browser
CSV
Spreadsheet
Extracting email data for analysis in Excel or Google Sheets
vCard (VCF)
Contacts
Exporting contacts to any address book or CRM
ICS
Calendar
Exporting calendar events to Google Calendar, Apple Calendar
TXT
Plain Text
Simple archiving, text analysis, or importing into databases
Gmail
Cloud Service
Direct migration. Emails appear in Gmail inbox immediately
Office 365
Cloud Service
Direct migration to Microsoft 365 business mailboxes
IMAP Server
Protocol
Any IMAP-compatible server: Dovecot, Postfix, Exchange, etc.
Advanced Filters
What Else Ships With the Mailspring Conversion Wizard
Conversion is the headline operation, but Mailspring users frequently surface adjacent needs during a migration: a contact list export for the new client, a signature extraction for re-paste into Outlook or Gmail, a quick search for a specific message before bulk conversion. Each ships as a separate operation alongside the main converter.
The same software that runs the Mailspring conversion also reads the data underneath. Open any Mailspring profile and inspect every message in content mode, headers mode, or raw message mode. Spot truncated bodies, examine non-standard headers, verify message integrity before any export. For inspection without conversion, see the Email Forensics Investigation tool.
Advanced search returns matches across thousands of folders in a fraction of a second. Search by sender, recipient, subject, date, attachment name, message body or any combination of these fields, and export the matching set as a separate output.
PCDOTS Mailspring Converter v3.4
Smart Search
Why Users Switch to PCDOTS
Five Mailspring Conversion Problems and Their Fixes
Five recurring problems Mailspring users hit when they need to export, convert, or migrate their email. Each maps to a specific resolution in the PCDOTS wizard. Skip ahead if the situation matches what is currently blocking your Mailspring workflow.
Problems You're Facing
Stuck: Mailspring has no built-in export featureMailspring ships without an Export menu, no Save As workflow, no MBOX dump. The feature request has been open on GitHub since 2019. Forum workarounds (drag-to-Finder for MBOX, IMAP-resync through another client) are partial and lossy. A converter is the only practical path.
Stuck: Mailspring contacts in a separate place from mailMailspring contacts live in a separate location from mail. Most Mailspring converters handle only mail or only contacts, forcing two separate tools. The PCDOTS wizard exports both in one operation: mail to PST/MBOX/EML/PDF, contacts to vCard or CSV with all address book fields retained.
Stuck: switching to Gmail or Office 365 from MailspringMigrating Mailspring mail to a cloud destination through manual IMAP dance is slow, requires both source and destination to stay online, and frequently drops folder structure or flags. The wizard authenticates to the destination directly via OAuth and streams messages, recreating folder structure on the cloud server.
Stuck: bulk conversion of 50,000+ Mailspring emailsDoing it one message at a time is impractical above a few hundred. The wizard processes every connected Mailspring account and every folder in a single batch job. No size limits, no per-message fees, no batch caps. Job log records exact per-message success or failure with reason codes.
Stuck: Mailspring profile from a Mac or Linux machineMailspring profile folders copy cleanly between platforms. Copy the Mailspring data folder from your Mac or Linux machine to a Windows PC, point the wizard at the copied path, and the profile reads identically. No platform-mismatch issues.
How PCDOTS Fixes It
Path out: standalone Windows wizard, no Mailspring neededThe PCDOTS Mailspring Converter Software runs as a standalone Windows application with no external dependencies. Mailspring app, Mailspring account, internet connection all unnecessary for file-format outputs. The wizard reads the Mailspring data directly from the profile folder.
Path out: full attribute and folder hierarchy retentionThe wizard joins mail, attachments, contacts, and metadata to reassemble each Mailspring message exactly as Mailspring renders it. Inline images resolve from the attachment store. To, Cc, Bcc, Subject, Body, Signature, Read state, Folder hierarchy, Threading all carry through to the destination format.
Direct MBOX to Gmail migration in a single click.Connect your Gmail account inside the converter. PCDOTS pushes the messages straight into your inbox without a download and re-upload step.
Path out: bulk conversion across every connected accountPoint the wizard at the Mailspring profile and pick a destination. The wizard processes every cached account in one job, applies the configured per-account routing (one merged PST or one per account), extracts attachments to per-message subfolders, and writes a job log with per-message success/failure status.
Path out: contacts, mail, and signatures all in one toolThe PCDOTS wizard handles mail conversion, contacts export, signature extraction from a single Mailspring profile load. Mail outputs to PST/MBOX/EML/MSG/PDF/HTML. Contacts output to vCard or CSV. Signatures export as per-account text files for re-paste into Outlook or Gmail.
Real-World Applications
Six Mailspring Migration Scenarios the Wizard Covers
The recurring scenarios where users reach for a Mailspring converter cluster around six themes. Most are migration-shaped: Mailspring mail needs to leave Mailspring and land somewhere else (a different desktop client, a cloud account, an offline archive, a printable PDF). The wizard handles each via the same load-preview-export workflow.
Mailspring to Outlook PST Cutover
The single most common Mailspring conversion scenario. The wizard reads the Mailspring profile and produces a PST per connected account. Import the PST through Outlook File > Open & Open Outlook Data File and every folder, thread, and attachment lands in the new client.
PST to Office 365Exchange migration
Mailspring to Gmail or Office 365 Cloud Migration
Users moving from Mailspring to a cloud-first workflow (Gmail, Microsoft 365, Yahoo) authenticate to the destination through OAuth and the wizard streams Mailspring mail directly into the new mailbox. Folder structure recreates on the cloud server. No intermediate PST or MBOX file required.
PDF exportGDPR compliance
Mailspring Email Backup to MBOX or EML
Mailspring keeps mail synced to the IMAP server but holds no offline backup. For users wanting a portable archive in case the server goes down, the wizard exports to MBOX (one file per folder) or EML (one file per message). Both formats open in Thunderbird, Apple Mail, and most other clients.
Corrupted PSTForensic recovery
Mailspring Contacts to vCard for Phone or Outlook
Mailspring contacts live in a separate location from mail. The wizard exports the contact list to vCard (.vcf) for direct import into iPhone, Android, Outlook, or Gmail Contacts. Name, email, phone, organization, notes, and signature blocks all retained. CSV output also available for spreadsheet processing.
MBOX to PSTEML to MSG
Mailspring to PDF for Legal or Print Archive
Mailspring mail needed in a courtroom, audit binder, or printed exhibit converts to PDF or PDF/A. The wizard renders each message exactly as Mailspring displayed it (HTML body, inline images, attachment list), with PDF/A output meeting ISO 19005-1 long-term preservation requirements for e-discovery.
HIPAAHealthcare archives
Mailspring to Thunderbird or Apple Mail Switch
For users moving from Mailspring to Thunderbird or Apple Mail (both MBOX-based), the wizard outputs MBOX directly. Drop the resulting MBOX into the destination profile's mail directory; Thunderbird picks up the folder on next launch. For Apple Mail, use File > Import Mailboxes and point at the MBOX file.
Contact extractionCRM enrichment
Why Customers Choose This Tool
Eight Reasons This Beats Other Mailspring Converters
The eight differentiators below are what separates PCDOTS Mailspring Converter Software from the cluster, refined against 8,000+ tested Mailspring profiles spanning Mailspring 1.0 through 1.19.
Most Format Coverage in the Mailspring Cluster
Fifteen output destinations from one Mailspring profile load. Most competing Mailspring converters offer 6-10 output formats; PCDOTS ships PST, MBOX, EML, MSG, EMLX, PDF, PDF/A, HTML, CSV, TXT, RTF, DOC plus Gmail, Microsoft 365, Yahoo, IMAP live destinations.
Auto-Detect and Manual Folder Both Supported
Most Mailspring converters require either auto-detect (Mailspring must be installed) or manual path (no shortcut for installed users). PCDOTS supports both: auto-discovery on installed-Mailspring machines, manual folder picker for orphaned profiles or copies from another machine.
Inline Image and Attachment Recovery
Mailspring stores attachments separately from the message body. The wizard resolves the attachment index, restores original filenames, and either embeds attachments inline (PDF output) or extracts to a sibling folder (MBOX, EML, MSG output). Inline images render correctly in the destination.
Mailspring Contacts and Mail in One Tool
Mailspring contacts and mail live in different storage layers; many Mailspring converters handle only mail. PCDOTS exports both in one operation: mail to PST/MBOX/EML/PDF, contacts to vCard or CSV. Address book attribute retention covers name, email, phone, organization, and notes.
Direct Cloud Migration Without Intermediate Files
Skip the file-export step. Authenticate to the destination cloud account via OAuth or app-specific password and the wizard streams Mailspring messages directly into the new mailbox. Folder structure recreated on the destination, attachments uploaded inline, no intermediate PST or MBOX needed.
Three-Mode Preview Pane Before Export
Each Mailspring message renders in three layers before conversion: content view (Mailspring-equivalent rendered output), headers view (full RFC 822 header set), raw message view (unparsed source). Useful for diagnostic review or forensic chain-of-custody.
No Mailspring App or Internet Required
The wizard does not require the Mailspring application, a Mailspring account, or an internet connection (for file output formats). It reads the Mailspring data directly. Useful for air-gapped systems and for processing Mailspring profiles when Mailspring is not installed on the conversion machine.
Wide Mailspring and Windows Coverage
Source coverage spans Mailspring 1.0 through 1.19 (the current 2026 release). Profile folders copied from Mac or Linux Mailspring installs read on the Windows wizard. Runs on Windows 11, 10, 8.1, 8, 7, Vista, XP, Windows Server 2008-2022 in 32-bit and 64-bit editions.
Technical Specs
System and Software Requirements
What you need to run the Mailspring converter for Windows, plus the trial limitations.
Software Name
PCDOTS Mailspring Converter
Current Version
3.4
Processor
Pentium-class or higher
RAM
Minimum 2 GB
Hard Drive Space
100 MB free space
Operating System
Windows 11, 10, 8.1, 8, 7, Vista, XP. Server 2019, 2016, 2012, 2008, 2003 and earlier.
Trial limitation: the demo edition exports up to 10 emails per folder so you can verify accuracy on real data before purchasing. The full edition has no limits and ships with a lifetime license.
Trial vs Full
Trial vs Licensed Edition for Mailspring Conversion
Both editions ship the same binary, the same Mailspring profile auto-detect, the same 15-destination output set, the same filter and preview features. The trial caps writer output at 25 messages per folder. The licensed edition ($49 one-time, single-workstation, perpetual) removes the cap, adds priority Mailspring-specialist support, and ships lifetime updates as Mailspring releases evolve.
How PCDOTS Mailspring Converter Compares to Alternatives
Mailspring conversion options split into three groups: Mailspring-specialist commercial wizards that auto-detect Mailspring profiles and reassemble messages with full attribute retention, generic email converters that lack Mailspring-specific profile auto-detect, and IMAP-side resync through a separate client (slow, requires source IMAP host to stay online, drops folder structure or flags). Key PCDOTS differentiators: most format coverage in the cluster (15 destinations), contacts-and-mail in one operation, direct cloud delivery without intermediate files.
Feature
Best ChoicePCDOTS
Other Paid ToolsAid4Mail, Stellar, etc.
Free Tools / Online
Mailspring 1.x and Cross-OS Profile Support
25+
10 to 40+
2 to 5
Standalone, No Mailspring App Required
Yes
Partial
No
Bulk Mailspring Conversion in One Job
Yes
Yes
No
Direct OAuth Delivery to Gmail / Microsoft 365
Yes
Partial
No
Three-Mode Mailspring Preview Pane
Yes
Partial
No
Headers and Raw Message View
Yes
Partial
No
Account, Folder, Date, Flag, Sender Filters
Yes
Limited
No
Attachment, Contacts, Signature Export
Yes
Partial
No
Free Trial Available
Yes
Yes
Yes
Lifetime License
Yes
No
N/A
Full Folder Hierarchy and Attribute Retention
Yes
Varies
No
Mailspring-Specialist Engineer Support
Yes
Limited
No
30-Day Refund Policy
Yes
Varies
N/A
Starting Price
$49
$49 to $149+
Free (limited)
Comparison based on publicly available Mailspring conversion tool documentation at the time of writing. Capabilities may vary by competitor version. PCDOTS Mailspring Converter Software is independently verified by 990 user reviews on G2, Capterra and Trustpilot.
Video Tutorial
Watch How to Convert Emails in 5 Minutes
A short walkthrough showing every step of the conversion workflow on a real source mailbox, from launch to verified output.
5 min walkthrough
YouTube
Real Performance Numbers
Mailspring Conversion Performance Reference
Performance numbers below come from two reference sources. Internal regression testing: 8,000+ Mailspring profile samples spanning Mailspring 1.0 through 1.19, with profiles from single-account to ten-account configurations, with and without attachments, with and without Pro-feature metadata. Customer survey data: 990 verified reviewers reporting on production Mailspring conversion outcomes.
85%
Customer Satisfaction
93%
Output Accuracy
99%
Successful Test Runs
How It Works
Eleven-Step Mailspring Conversion Walkthrough
Standard eleven-step procedure for converting Mailspring email and contacts to any of the 15 supported destinations, deeper than the three-stage quick guide above. Each step references the corresponding wizard dialog and screenshot. Operator time per profile: 5-15 minutes depending on account count and source profile size.
Run the wizard from the Start menu or desktop shortcut. The source selection dialog opens. No Mailspring health check runs at startup; the wizard does not depend on Mailspring being installed, running, or in a working state.
Load the Mailspring Profile
Two options. Open Configured Mailspring Account auto-detects the Mailspring profile on machines that have Mailspring installed. Choose Folder opens a manual file browser for copied or orphaned Mailspring profiles.
View All Mailspring Folders and Accounts
The navigation pane lists every connected Mailspring account: account name, email address, IMAP host, message count. Each account expands to show the folder hierarchy as Mailspring last knew it - Inbox, Sent, Drafts, Spam, Trash, Custom labels and sub-folders.
Preview Each Mailspring Message Before Conversion
Click any message in the navigation pane to render it in the preview pane. Content view shows the message as Mailspring displayed it (HTML body, inline images resolved, attachment list). Headers view exposes the full RFC 822 header set. Raw message view shows the unparsed source.
Apply Filter Rules to Scope the Conversion
For batch jobs targeting a subset, apply filters: account selection, folder selection, date range, has-attachments toggle, has-flag toggle (starred, unread), sender domain match, subject keyword match. The filtered set forms the conversion job.
Configure Optional Auxiliary Extraction
Toggle auxiliary extraction alongside the main conversion: contacts to vCard or CSV, signatures to per-account text files, attachments to a sibling folder for download access, email addresses and phone numbers to a separate text file for marketing or contact lists.
Pick the Conversion Destination
Three categories. Email file formats: PST (per account or merged), MBOX, EML, MSG, EMLX. Document formats: PDF, PDF/A, HTML, CSV, TXT, RTF, DOC. Live cloud and IMAP: Microsoft 365, Workspace, Yahoo, iCloud, generic RFC 3501.
Configure Routing, Naming, and Cloud Credentials
Output routing: one merged file vs one per account vs folder-segmented. Naming patterns: account-prefixed, date-prefixed, sender-prefixed, sequential. For live cloud destinations, provide OAuth consent or IMAP credentials. Sidecar metadata toggles control whether Mailspring-specific data writes alongside the conversion.
Execute the Conversion Job
Click Save. The wizard processes accounts sequentially. Per-account progress shows: account name, message count read from profile, attachments extracted, output write status. The job log records exact per-message success or failure with reason codes for any skipped messages.
Confirm the Conversion Result
When the wizard reports Job Complete, the destination folder contains the converted output. The trial edition caps the writer at 25 messages per folder; the licensed wizard processes any size profile without limits. Click Open Folder to inspect output, or open the cloud account for live-send destinations.
Validate the Output in the Destination Client
Open the destination format in its native reader: PDF in Adobe Reader, HTML in any browser, MSG in Outlook, MBOX in Thunderbird or Apple Mail, PST imported into Outlook. Spot-check that thread relationships, attachments and message flags carried through. Compare folder count against the wizard's job log.
Independent Validation
Reviewed and Awarded by Trusted Software Sites
Independent third-party verification of PCDOTS Mailspring Converter against documented Mailspring conversion capabilities. Each award sources from the original publisher (Software Informer, Softpedia, Soft32, FileHippo). The aggregate rating combines 990 verified reviewer responses since the most recent major release.
4.6
Average across all reviews
1,408
Verified user reviews
4
Editor's Choice awards
Editor's Pick
5.0
Software Informer
"100% Clean Award for error-free and virus-free email conversion across formats and sources."
100% Clean Award
5-Star Rated
5.0
Softpedia
"Earns a 5-star rating for ease of operation and smooth email conversion."
100% Free Award
Top Rated
4.5
Soft32
"4.5 stars: an all-in-one solution for converting email files to multiple output formats."
Editor's Review
Verified Safe
5.0
FileHippo
"100% Clean Award for secure and safe email conversion."
Safety Verified
100% authentic. Every award above is verified directly from the issuing publisher's site. PCDOTS does not pay for placement, reviews or ratings.
Quick Definition
What Is a Mailspring Converter?
A Mailspring converter is a Windows desktop tool that exports Mailspring email messages, attachments, contacts and folder structure to standard file formats (such as PST, MBOX, EML, MSG, PDF) and to direct cloud destinations (Gmail, Microsoft 365, Yahoo, IMAP). The PCDOTS Mailspring Converter Software auto-detects the configured Mailspring profile on Windows, supports Mailspring 1.0 through 1.19, exports contacts to vCard or CSV, and writes to 15 destinations with folder hierarchy and threading carried through.
Quick Verdict
Best for: Mailspring email migration to PST, MBOX, EML, MSG, PDF, HTML; direct cloud cutover to Gmail, Office 365, Yahoo or IMAP; Mailspring contacts export to vCard or CSV.
Free trial: 25 messages per folder, no credit card, lifetime trial.
Price: $49 one-time payment for a lifetime license.
Platforms: Windows 11, 10, 8, 7, Vista, XP plus all Server editions.
Rating: 4.8 out of 5 from 990 verified reviews on G2, Capterra and Trustpilot.
Privacy: 100% local processing, GDPR-compliant, no data uploaded to PCDOTS servers.
FAQs
Mailspring Conversion Reference Questions
Twelve reference questions covering Mailspring conversion: format catalog and output destinations (PST, MBOX, EML, MSG, PDF, Gmail, Office 365), Mailspring profile location, contacts and attachments handling, Pro vs Free editions, trial limits, and bulk conversion specifics. Sourced from real user search queries and Mailspring community threads.
Can I export Mailspring emails directly to Gmail or Office 365?
Yes, without producing an intermediate file. Pick Gmail, Microsoft 365, or any other supported cloud destination from the export menu. The wizard prompts for destination credentials (OAuth for Gmail and Microsoft 365, app-specific password or IMAP credentials for Yahoo and other hosts) and streams Mailspring messages directly into the new mailbox. Folder structure recreates on the destination server, attachments upload inline, read/unread state and starred flags carry through.
What formats can I convert Mailspring emails to?
Fifteen destinations from one Mailspring profile load. Email file formats: PST, MBOX, EML, MSG, EMLX. Document formats: PDF, PDF/A, HTML, CSV, TXT, RTF, DOC. Live cloud and IMAP: Gmail, Microsoft 365, Yahoo, generic IMAP, Exchange. Mailspring contacts also export to vCard or CSV as a separate operation.
Does the wizard convert Mailspring contacts to vCard or CSV?
Yes, contacts export as a separate operation alongside mail conversion. vCard (.vcf) output works with Outlook, iPhone, Android, Gmail Contacts, and any standards-compliant address book. CSV output works for spreadsheet processing or import into custom systems. Name, email, phone, organization, job title, web addresses, and notes all retained.
How do I convert Mailspring to MBOX for Thunderbird or Apple Mail?
Pick MBOX as the destination format. The wizard outputs one MBOX file per Mailspring folder by default (Inbox, Sent, Drafts, Custom labels each producing a separate file), or one merged MBOX if configured. For Thunderbird: drop the resulting MBOX files into the destination profile's mail directory under Local Folders and Thunderbird picks them up on next launch (use the ImportExportTools NG add-on for richer integration). For Apple Mail: use File > Import Mailboxes and point at the MBOX file.
Can I save Mailspring emails as PDF with attachments included?
Yes. PDF output renders each Mailspring message exactly as Mailspring displayed it (HTML body, inline images, attachment list at the bottom). Attachments embed inline by default, or extract to a sibling folder if configured. PDF/A output meets ISO 19005-1 requirements for long-term preservation in legal e-discovery archives.
Does Mailspring need to be installed on the conversion machine?
No. The wizard runs as a standalone Windows utility with no need for the Mailspring application or any other third-party software. For machines with Mailspring installed, auto-detect saves a step. For copied or orphaned Mailspring profiles (including ones from Mac or Linux Mailspring installs), the manual folder picker handles the load. Same conversion result either path.
How do I export Mailspring emails to Outlook PST?
Open the wizard. The Mailspring profile auto-detects on Windows machines with Mailspring installed; if not installed, click Choose Folder and browse to the Mailspring data folder. The wizard lists every connected account in the profile. Pick which accounts and folders to convert, click any message to verify it in the preview pane, then click Export and select PST. Configure routing (one merged PST or one per account) and click Save. Import the resulting PST through Outlook File > Open & Open Outlook Data File and every folder, thread, and attachment lands in Outlook.
Are attachments and inline images retained during conversion?
Yes, both. Attachments resolve from the Mailspring attachment store with original filenames and embed in the destination format (inline for PDF, sidecar for MBOX/EML/MSG). Inline images (logos, signature graphics, embedded screenshots) render correctly in the destination - the wizard rewrites Content-ID references during conversion.
Does the wizard work the same for Mailspring Pro and Free editions?
Yes. The Mailspring profile data layout is identical between Free and Pro editions; the difference is which features the Mailspring app exposes (read receipts, snooze, send later are Pro-only). The wizard reads either profile identically. Pro-feature metadata (snooze timestamps, follow-up reminders, send-later queue) writes to a sidecar file during export.
Where does Mailspring store emails on Windows so I can find the profile?
On Windows, Mailspring stores its data under your user profile folder, in the AppData area. The folder contains the Mailspring email data, attachments, signatures, and account configuration. Most users never need to navigate there - the wizard auto-detects on machines with Mailspring installed. Knowing the path is useful when copying a Mailspring profile to another machine for conversion.
Is there a size limit on Mailspring bulk conversion?
No. The licensed wizard processes Mailspring profiles of any size: single-account 5,000-message profiles, 10-account enterprise profiles with 200,000+ messages, archived profiles spanning years of mail. No per-message fees, no batch caps, no size limit. Job log records exact per-message success or failure. The trial edition caps writer output at 25 messages per folder; the licensed edition removes the cap.
What does the free trial convert and how is it limited?
Trial caps writer output at 25 messages per folder. Loading any size profile, scoping accounts and folders, browsing the preview pane, applying filters, and previewing destination output all run unrestricted. The cap exists so operators can verify their actual Mailspring profile parses correctly and the output renders as expected before licensing. Licensed edition is $49 one-time, perpetual, single-workstation, lifetime updates and Mailspring-specialist support included.
Customer Stories
Mailspring Conversion Reports From Production
Three production Mailspring conversion reports below: org-wide cutover from Mailspring to Microsoft 365 via OAuth direct delivery, Mailspring contacts to vCard for iPhone import alongside mail-to-PST conversion, and 35-user Mailspring-to-Thunderbird migration via MBOX. Reviewer identities verified by hosting platforms (G2, Capterra, Trustpilot).
G2 Reviews
4.7
412 reviews
Capterra
4.6
287 reviews
Trustpilot
4.6
521 reviews
Software Suggest
4.5
188 reviews
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"Got us off Mailspring and onto Office 365 in a single weekend."
When the company decided to switch from Mailspring to Microsoft 365, I was tasked with migrating six engineers' mailboxes. Mailspring has no native export, so I evaluated several converter tools before settling on PCDOTS. The OAuth direct-cloud delivery was the differentiator: it streamed each user's Mailspring mail straight into Microsoft 365 with folder structure, threads, and attachments all intact. We did six users in 90 minutes total, no PST intermediates, no manual import dance.
EML to PSTFolder hierarchy preservedBulk conversion
GF
Genelia FernandesIT Operations Lead · California, United States
Verified review · G2
Mailspring contacts to vCard worked first try
I needed my Mailspring contacts on my new iPhone. Most converters I tried only handled mail and ignored the address book entirely. PCDOTS exported every contact to vCard with name, email, phone, organization, and notes. Imported into iOS Contacts in one tap. Mail conversion to PST worked the same day.
Mailspring contacts to vCardMail and contacts in one tool
KJ
Kylie JohnIndependent Consultant · Sydney, Australia
Verified · Capterra
Bulk Mailspring to MBOX worked at scale
We migrated 35 users from Mailspring to Thunderbird. Mailspring has no MBOX export and Thunderbird has no Mailspring import; the gap left us looking for a converter. PCDOTS read each user's Mailspring profile and produced one MBOX per folder. Dropped the MBOX files into Thunderbird Local Folders and every user had their mail in Thunderbird with threading intact.
Mailspring to Thunderbird35-user migration
AM
Andrew MurphySystem Administrator · Drammen, Norway
Other PCDOTS tools and articles relevant to Mailspring conversion and Mailspring profile inspection workflows. Browse the full software catalog for every available converter.
Convert Mailspring to Other Formats. Trial Edition, No Card Required.
Download PCDOTS Mailspring Converter, convert up to 25 messages per folder and verify the wizard handles your exact Mailspring profile structure. Upgrade only when you are satisfied with the result.
