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What is EML?

EML is the standard email file format following RFC 822, used by most email clients for message storage and export.

What is MPP?

Microsoft Project (MPP) is a project management file format used for storing project plans, schedules, resource assignments, and Gantt charts.

When Should You Use EML vs MPP?

Use EML When...

Reach for EML when your priority is email export, message archiving, mail migration — its uncompromising quality ensures every detail is preserved.

Use MPP When...

Reach for MPP when your priority is project plans, gantt charts, task tracking — its efficient compression makes sharing fast and storage minimal.

EML vs MPP: Key Differences

  • •EML and MPP diverge on compression: lossless compression for the source, lossy compression for the target.
  • •The switch from lossless compression to lossy compression means you gain significant space savings while accepting minor quality trade-offs.
  • •Transparency: N/A — converting from EML will merge transparency into a solid background
  • •EML files are typically Small for plain text, larger with attachments while MPP files range 500KB to 50MB for large projects
  • •EML is optimized for email export, message archiving, mail migration while MPP is designed for project plans, gantt charts, task tracking — choose based on your specific workflow needs

Advantages of EML

  • ✓EML compresses data using lossless methods, keeping file sizes manageable for Email export, message archiving, mail migration.
  • ✓Industry-wide support means EML files open anywhere — from legacy systems to the latest devices.
  • ✓Lossless quality makes EML the gold standard for archival and master copies.
  • ✓From professional software to open-source alternatives, EML works out of the box.

Advantages of MPP

  • ✓MPP uses lossy compression tailored for Project plans, Gantt charts, task tracking.
  • ✓MPP is supported natively on virtually every device, browser, and operating system.
  • ✓MPP files are compact and quick to transfer, even over slow connections.
  • ✓MPP integrates seamlessly with all major creative tools and workflows.

Common Use Cases for EML to MPP Conversion

  • Onboarding materials
  • Policy and procedure manuals
  • Grant applications
  • Case studies and whitepapers
  • Professional reports and proposals
  • Academic papers and theses

Industry Applications

Supply Chain ManagementInsuranceReal EstateRegulatory ComplianceBusiness AdministrationAcademic Publishing

Best Practices for EML to MPP Conversion

  • →Before converting EML to MPP, review the document structure — multi-column layouts, text boxes, and floating images behave differently across formats
  • →Export a PDF preview alongside the MPP file so you have a reference of how the document should look
  • →Check that hyperlinks and cross-references survived the EML to MPP conversion — some formats handle links differently
  • →Run a spell check before conversion to avoid propagating errors into the final document
  • →Keep the original editable file in case the conversion introduces layout shifts
  • →Test the output on at least two different applications or devices

Troubleshooting EML to MPP Conversion

  • !EML to MPP formatting looks off → complex layouts with tables and columns may shift between formats
  • !Fonts render differently in MPP → embed fonts or use standard web-safe fonts before converting
  • !Images missing from the MPP output → ensure images are embedded in EML, not linked externally
  • !Tracked changes disappeared after converting EML to MPP → some document formats don't support revision tracking

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Convert EML files to MPP online for free. High-quality conversion with no registration required.

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About EML and MPP

EML

EML (EML emails) - Email Message, RFC 822 standard email file format. Best for email export, message archiving, mail migration.

MPP

MPP (Project MPP) - Microsoft Project, project management file format. Ideal for project plans, gantt charts, task tracking.

Format Comparison

CompressionLossless → Lossy
TransparencyN/A
Use CaseConvert from email export, message archiving, mail migration to project plans, gantt charts, task tracking
File Size~500KB to 50MB for large projects after conversion

FAQs

Is converting EML to MPP free?

Yes, GoConvertFile offers free conversion of EML to MPP for files up to 100MB. No registration required.

How long does it take to convert EML to MPP?

Most EML to MPP conversions complete within seconds for standard-sized files. Larger files may take longer depending on the conversion complexity.

What is MPP best used for?

MPP is ideal for project plans, gantt charts, task tracking. Microsoft Project, project management file format

Does converting EML to MPP lose quality?

Yes, converting EML to MPP uses lossy compression, which reduces file size by discarding some visual data. Set quality to 85-95% for a good balance of quality and file size.

What file size should I expect after converting EML to MPP?

MPP files are typically 50-80% smaller than EML files because MPP uses efficient lossy compression. The exact reduction depends on quality settings.

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