NuGet · #2823 most downloaded on NuGet

MsgReader

6.1.410M downloads/moSicos1977/MSGReader ↗New releases in your daily digest, changelog included.

Read Outlook MSG and EML files without using Outlook. The MSGReader supports MSG E-Mail (also signed), Contact, Appointment, Task, Sticky notes and Contact files. The EML reader supports MIME 1.0 encoded files.

Last release today
08 Oct 2026
Release timing varies
gaps range from 1.2 years to 125.7 years
Nearly every release is documented
notes for 2 of 2 stable releases
190 versions withdrawn
withdrawn after publishing
127 years old
192 releases · first in 1900

Release timeline

192 releases since 1900

Releases

6.1.48 Oct 2026
Various fixes for decoding chars from RTF
Updated nuget packages

Various fixes for decoding chars from RTF
Additional notes
Fixes a path traversal issue

Reader.ExtractToFolder writes each attachment of a parsed .msg or .eml email to outputFolder + attachment.FileName. For attachments unpacked from an embedded TNEF (winmail.dat) part the filename is taken straight from the TNEF stream and never passes through the RemoveInvalidFileNameChars sanitiser that normal MAPI and MIME attachment names do. So a crafted email can give a TNEF attachment a filename containing ../ segments and have the extracted file written outside the output folder, with attacker-chosen contents.
Open source →
6.1.31 Jan 1900withdrawn
Various fixes for decoding chars from RTF
Updated nuget packages

Various fixes for decoding chars from RTF
Additional notes

1900190219041906190819101912191419161918192019221924192619281930193219341936193819401942194419461948195019521954195619581960196219641966196819701972197419761978198019821984198619881990199219941996199820002002200420062008201020122014201620182020202220242026

19002026

One column per quarter.

Updated nuget package
Various RTF decoding fixes
Updated MSG Viewer

6.1.21 Jan 1900withdrawn2 sources agree

Fix mojibake when double byte text is written under a single byte font encoding

Updated nuget packages
Fix mojibake when double byte text is written under a single byte font encoding

6.1.11 Jan 1900withdrawn

- Updated nuget packages

Updated nuget packages

Additional notes

Updated nuget packages
Fixed some issues

Open source →

6.1.01 Jan 1900withdrawn2 sources agree

Added a new way of decoding PT_STRING8 to avoid issues with unicode that is set as the default code page on .net core

Added a new way of decoding PT_STRING8 to avoid issues with unicode that is set as the default code page on .net core

6.0.131 Jan 1900withdrawn2 sources agree

Issues #520 and #521 (fixed by coPilot)

Updated nuget packages
Issues #520 and #521 (fixed by coPilot)

6.0.121 Jan 1900withdrawn

- Updated nuget packages - Issues fixed

Updated nuget packages
Issues fixed

6.0.111 Jan 1900withdrawn

- Updated nuget packages

Updated nuget packages

Additional notes

Updated nuget package to resolve security issue with OpenMCDF

Open source →

6.0.101 Jan 1900withdrawn

Fix HTML body encoding for non-ASCII characters in .NET Core+ by @Copilot in https://github.com/Sicos1977/MSGReader/pull/491

Fix HTML body encoding for non-ASCII characters in .NET Core+ by @Copilot in https://github.com/Sicos1977/MSGReader/pull/491
Fix multi-block Base64 encoded-word decoding (GB2312, UTF-8) by @Copilot in https://github.com/Sicos1977/MSGReader/pull/494
Fix missing sender email for Exchange-originated MSG files via PR_SENDER_SMTP_ADDRESS_ALTERNATE (0x5D0A) by @Copilot in https://github.com/Sicos1977/MSGReader/pull/498

Additional notes

What's Changed

Fix HTML body encoding for non-ASCII characters in .NET Core+ by @Copilot in #491
Fix multi-block Base64 encoded-word decoding (GB2312, UTF-8) by @Copilot in #494
Fix missing sender email for Exchange-originated MSG files via PR_SENDER_SMTP_ADDRESS_ALTERNATE (0x5D0A) by @Copilot in #498

Full Changelog: 6.0.9...6.0.10

Open source →

6.0.91 Jan 1900withdrawn

- Updated nuget packages

Updated nuget packages

Additional notes

Full Changelog: 6.0.7...6.0.9

Open source →

6.0.81 Jan 1900withdrawn

- Updated nuget packages

Updated nuget packages

6.0.71 Jan 1900withdrawn

- Updated nuget packages

Updated nuget packages

Additional notes

What's Changed

Remove SenderSmtpAddressAlternate (0x5D0A) fallback that returns mailbox owner email by @Copilot in #487
Update PR_MESSAGE_SIZE and PR_HASATTACH properties after attachment deletion by @Copilot in #488
Handle invalid PT_SYSTIME values in MSG file parsing by @Copilot in #489
Fix inline attachment detection incorrectly matching filename in body text by @Copilot in #490
Fix issue with RTF/MELA header decoding by @nitrotm in #492

Full Changelog: 6.0.6...6.0.7

Open source →

6.0.61 Jan 1900withdrawn

Fix regression: Preserve leading space in multiline email headers (RFC 2822 compliant) by @Copilot in #476

What's Changed

Fix regression: Preserve leading space in multiline email headers (RFC 2822 compliant) by @Copilot in #476
Fix character encoding issue with German umlauts in attachment filenames by @Copilot in #477
Add NETStandard.Library dependency for net462 to fix ASP.NET 4.81 compatibility by @Copilot in #480

Full Changelog: 6.0.5...6.0.6

Open source →

6.0.51 Jan 1900withdrawn

Fixes issues #467 , #469 , #470 (mostly done by co-pilot)

Updated nuget packages
Fixes issues #467, #469, #470 (mostly done by co-pilot)

What's Changed

Issue 467 by @YannBrulhart74 in #468
[WIP] Unknown parameter in Content-Disposition. Ask developer to fix! Parameter: CREATION_DATE by @Copilot in #471
Fix: Respect Content-Disposition header for text/* attachments with quoted-printable encoding by @Copilot in #472
Verify fix for attachment filename fallback when ContentType.Name is missing by @Copilot in #473
Fix RTF \line control word not being converted to newlines in HTML output by @Copilot in #474

New Contributors

@Copilot made their first contribution in #471

Full Changelog: 6.0.4...6.0.5

Open source →

6.0.41 Jan 1900withdrawn

Fixed UTF-8 character corruption in email headers (thanks to @PrzemyslawKlys )

Updated nuget packages
Fixed UTF-8 character corruption in email headers (thanks to @PrzemyslawKlys)
Replace newtonsoft with system.text.json (thanks to @PrzemyslawKlys)

Open source →

6.0.33 Aug 2025

Leave stream open when saving a MSG attachment

Leave stream open when saving a MSG attachment

Open source →

6.0.21 Jan 1900withdrawn