Last Revision:
February 19, 2026
The File Type and Unpacker modules are used by MailMarshal (SEG), ECM, and WebMarshal. Updates are made available for recent versions through the Automatic Updates service. Each product release includes the current update of File Type and Unpacker.
For details of the File Type and Unpacker versions published for each product version, see Knowledgebase article Q20446.
For more information about additional minor features and bug fixes, see the release history.
For earlier updates, see previous versions of Release Notes linked from Knowledgebase article Q20446.
The following items have been changed or updated in the specific build versions of File Type and Unpacker listed.
| FTU-470 | Failed URL extraction from QR images could result in messages being deadlettered. Fixed. |
| FTU-471 | Certain PDF files were not correctly extracted, resulting in messages being deadlettered. Fixed. |
| FTU-464 | Email addresses in calendar invites could be incorrectly rewritten in some cases. Fixed. |
| FTU-453 | In release 2025.03.01, extraction of URLs from third party links was not thread safe. Fixed. |
| FTU-454 | In release 2025.03.01, the setting to enable or disable extraction of URLs from third party links was not fully honored. Fixed. |
| FTU-455 | URLs rewritten by additional third party URL scanning services can be extracted to be checked by MailMarshal technologies. The rewritten URLs are not altered. |
| FTU-382 | Zstandard archives are recognized and unpacked. |
| FTU-428 | Header lines in attached email messages were counted as part of the headers of the parent message when calculating header length. Fixed. |
| FTU-431 | Certain MST files were incorrectly recognized as MSI. Fixed. |
| FTU-433 | URLs rewritten by some third party URL scanning services can be extracted to be checked by MailMarshal technologies. The rewritten URLs are not altered. |
| FTU-434 | The "editdata.mso" component in documents does not use the mso format and caused messages to be deadlettered. Fixed. |
| FTU-437 | Excel files with a missing relationship target were deadlettered. Fixed. |
| FTU-439 | Some XML files extracted from Office 2007+ documents can be very large and can cause the "massively redundant data" calculation to trigger. Fixed: these files no longer are part of the compression calculations. |
| FTU-440 | Some documents created by LibreOffice were deadlettered because they contain invalid CustomXML relative paths. Fixed: the relative part of the path is ignored. |
| FTU-385 | An updated version of the PDF unpacker is included. |
| FTU-372 | SVG graphic files are recognized. |
| FTU-408 | PDF files with very long file names are unpacked correctly. |
| FTU-384 | Messages attracting more than one repacking action could become malformed. Fixed. |
| FTU-374 | Messages containing an attachment but no body part could become malformed when repacked. Fixed. |
| FTU-294 | Power BI Report files are and internal components are recognized and unpacked. |
| FTU-297 | PGP Public Key files are recognized. |
| FTU-326 | An updated version of the WebP library is included. |
| FTU-348 | Extraction of URLs for URLDeep evaluation is improved. |
| FTU-363 | An updated version of the PDF unpacker is included. |
| FTU-364 | Password extraction for encrypted archives has been enhanced. |
| FT-281 | RAR archives with only some files password encrypted are correctly detected and usable files are passed to the unpacker. |
| FT-290 | File Type release versions now are numbered by the calendar year and quarter. |
| FT-292 | P12 and PFX certificate files are recognized. |
| FT-295 | Specific Windows executable files were not recognized. Fixed. |
| FT-296 | Specific message body text was incorrectly treated as an attached email message. Fixed. |
| UNPACK-380 | Unpacker release versions now are numbered by the calendar year and quarter. |
| UNPACK-383 | Unpacking did not honor the content-disposition Attachment in specific cases. Fixed. |
| UNPACK-384 | An updated version of the PDF unpacker is included. |
| UNPACK-387 | Password extraction for encrypted archives could cause the MailMarshal Engine to stop unexpectedly. Fixed. |
For earlier updates, see previous versions of Release Notes linked from Knowledgebase article Q20446.
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