Professional Email Conversion Made Simple
Trusted Email Conversion and Migration Since 2005
Convert between 40+ email formats, migrate to cloud services, and preserve your data with high fidelity—all in one automated workflow.
Why Choose Aid4Mail Converter
Direct Format Access
Read PST, OST, OLM & MSG directly—no Outlook or Mac
Cloud Migration Ready
Microsoft 365 tenant-wide, Gmail, and any IMAP service
All-in-One Workflow
Automated processing from collection to export
Trusted Since 2005
Used by Fortune 500 and government agencies
Email Migration Without the Headaches
Stop struggling with incompatible formats, data loss, and manual processes.
Traditional Email Migration
- ⯈ Multiple tools for different formats
- ⯈ Manual, error-prone processes
- ⯈ Data corruption and loss risks
- ⯈ Broken folder structures
- ⯈ Missing attachments and metadata
- ⯈ Requires Outlook installed to read PST/OST
With Aid4Mail Converter
- ⯈ Single tool for 40+ formats
- ⯈ Fully automated workflow
- ⯈ High-level data integrity
- ⯈ Full folder preservation
- ⯈ Complete metadata retention
- ⯈ Reads Outlook PST/OST without Outlook installed
Core Capabilities
Everything you need for professional email conversion and migration.
40+ Format Support
Convert between all major email formats—Outlook, Apple Mail, Google, Thunderbird, and more.
- Outlook PST, OST & MSG
- Apple Mail OLM & EMLX
- Google Takeout archives
- Thunderbird, Maildir, mbox, EML
No Outlook or Mac Required
Read Outlook and Apple Mail stores directly, with no Outlook install, no Mac, and no MAPI dependency.
- PST & OST read directly
- OLM without a Mac
- Password-protected PST access
- Recover orphaned OST files
Microsoft 365 Tenant-Wide
Collect across an entire Microsoft 365 tenant with App-Only Access—no individual user sign-ins.
- Organization-wide collection
- No per-user credentials
- Graph API over OAuth 2.1
- Incremental, resumable
Cloud Migration
Migrate directly to Microsoft 365, Gmail, Yahoo Mail, and any IMAP-compatible service.
- OAuth 2.1 authentication
- Automatic folder mapping
- Incremental processing
- Backup of failed uploads
Unattended Workflow
Set it and forget it—automated processing from collection through export.
- Journaling envelope removal
- Sequential multi-session runs
- Detailed audit logs
- Progress monitoring
Data Integrity & Recovery
Preserve complete email fidelity and recover from damaged mailboxes.
- Full header & metadata retention
- Corrupted-mbox recovery
- Fixes non-standard format errors
- Folder & status preservation
Deduplication
Remove duplicate emails with a speed-optimized Int64 hash, based on the same data as MIH+.
- Fast Int64-hash deduplication
- Catches messages with no Message-ID
- Template-based file naming
Portable Email Viewer
Free portable viewer for reviewing and tagging emails without installation.
- Handles 50,000+ emails (proven on 100,000+)
- Advanced search & tagging
- Zero installation
- Freely redistributable
Accessibility
Built for every operator, including assistive-technology users.
- Full keyboard navigation
- Screen reader support
- Windows high-contrast mode
- UI zoom up to 150%
Conversion Speed You Can Reproduce
We measured Aid4Mail on a public email corpus, so the numbers are verifiable—not estimates.
(public Podesta corpus)
Measured in an internal Fookes engineering test on a single high-end Windows workstation (AMD Ryzen 9 9950X3D, NVMe SSD), converting an mbox source with no filtering. Results reflect this specific corpus and hardware; throughput varies with source format, target format, message sizes, and system. For flat-file targets such as mbox, this single-session rate extrapolates to roughly 1 TB per hour—enough to process terabyte-scale archives overnight (illustrative, not a guaranteed rate). Conversion to Outlook PST routes through Microsoft’s MAPI and runs slower than flat-file targets.
Simple, Automated Workflow
From collection to export in one automated process.
Configure Session
Select your source format and destination. For IMAP accounts, Aid4Mail auto-detects the server settings.
IMAP auto-config: Server settings detected automatically for IMAP accounts
Collection & Processing
Aid4Mail collects emails, removes journaling envelopes and duplicates, fixes format errors, and organizes folder structures.
Fully Automated: Unattended processing with error recovery
Format Conversion
Convert to your target format while preserving all metadata, attachments, and folder structures.
High Fidelity: High-level data preservation
Export & Review
Export to PST, EML, CSV, PDF, or cloud services. Review with the included portable Email Viewer.
Ready to Use: Immediate access to converted emails
Perfect For Your Email Challenges
Trusted by IT professionals, law firms, and enterprises worldwide.
Email Migration
- Collect Microsoft 365 tenant-wide, no user sign-ins
- Migrate to Microsoft 365, Gmail, or IMAP
- Resume interrupted collections (incremental)
- Preserve complete folder structures
Format Conversion
- Read PST/OST without Outlook installed
- Produce searchable PDF/A for archival
- Export to JSON or CSV for analysis
- Process Google Takeout & legacy formats
Legal & Compliance
- Produce searchable PDF/A review sets
- Share portable review packages (Email Viewer)
- Stamp exports with EDRM MIH/MIH+ IDs
- Rely on per-message export logs
Need Advanced Investigation Features?
Aid4Mail Investigator adds powerful forensics and eDiscovery capabilities for professionals who need more.
Edition Comparison
| Feature | Converter | Investigator |
|---|---|---|
| 40+ Format Support | | |
| Cloud Migration | | |
| Portable Email Viewer | | |
| AI-Powered Filtering & Classification | | |
| Pre-Acquisition Filtering (90% reduction) | | |
| Cloud Attachment Collection | | |
| Deleted Email Recovery | | |
| Advanced Search (Boolean, Regex) | | |
| Google Vault Support | | |
| Concurrent Processing | | |
| Python Scripting | | |
Aid4Mail Converter
Professional email conversion & migration
- 40+ format support
- Cloud migration
- Incremental acquisition
- Speed-optimized deduplication
- Portable Email Viewer
Aid4Mail Investigator
Advanced forensics & eDiscovery capabilities
- Everything in Converter, plus:
- Pre- & Post-acquisition filtering
- AI classification & analysis
- Cloud attachments collection
- Email recovery & carving
Flexible Monthly Option for One-Off Projects
Need advanced features for a single investigation? Investigator’s monthly subscription lets you access enterprise-grade capabilities without the annual commitment.
- Use for just one month when needed—perfect for occasional investigations
- Access AI analysis, advanced search, and forensic recovery on demand
- No long-term commitment required—cancel anytime
Trusted by professionals in law, forensics, and IT worldwide
20+
Years of excellence
100+
Countries served
40+
Formats supported
Fortune 500
Enterprise-trusted
Ready to Simplify Your Email Conversion?
Download Aid4Mail Converter today and experience dependable, automated email conversion. Free trial with full features.