Some attachments appear in the message source but do not displayed as such. Make TB more tolerant to incorrect MIME structure: multipart/alternative where last part is a PDF attachment.
Categories
(MailNews Core :: MIME, defect)
Tracking
(Not tracked)
People
(Reporter: david, Unassigned)
References
(Blocks 2 open bugs)
Details
Attachments
(1 file)
(deleted),
application/mbox
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Details |
Comment 1•7 years ago
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Updated•7 years ago
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Comment 2•7 years ago
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Comment 3•7 years ago
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Comment 4•7 years ago
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Updated•7 years ago
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Updated•7 years ago
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Comment 9•4 years ago
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This broken structure is used by one of the major banks in Sweden for their automated invoices, which unfortunately means that the most important of the mail is missing. I've reported it to them but I doubt they'll fix it as they'll likely (incorrectly) conclude it's a bug in Thunderbird as "it works for everyone else".
This is the MIME structure of this mail:
Content-Type: multipart/alternative;
boundary="--==_mimepart_607445c4c86f8_e94214bbc411411310";
charset=UTF-8
Content-Transfer-Encoding: 7bit
----==_mimepart_607445c4c86f8_e94214bbc411411310
Content-Type: text/plain;
charset=UTF-8
Content-Transfer-Encoding: quoted-printable
...
----==_mimepart_607445c4c86f8_e94214bbc411411310
Content-Type: text/html;
charset=UTF-8
Content-Transfer-Encoding: quoted-printable
...
----==_mimepart_607445c4c86f8_e94214bbc411411310
Content-Type: application/octet-stream
Content-Transfer-Encoding: base64
Content-Disposition: attachment;
filename=Faktura.pdf
Content-ID: <607445c4c9fda_e94214bbc411411455@rbp-postal-app-001.wa.loc.mail>
...
----==_mimepart_607445c4c86f8_e94214bbc411411310--
Comment 10•2 years ago
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This is an issue also for me on Thunderbird 102.2.1: emails from the Italian Tax Authority with important PDF attachments are sent as "Content-Type: multipart/alternative" and the attachments are not displayed in Thunderbird, even though the webmail (Roundcube in my case) shows them correctly. So luckily there are easy workarounds, i.e. just open the mail elsewhere if you know it has attachments, but this is annoying nevertheless.
Updated•2 years ago
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Comment 11•2 years ago
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What is the current status of these things? Has the MIME parsing been improved so that it is no longer so fragile?
Reporter | ||
Comment 12•2 years ago
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I just tested the "Test" folder [attached to the defect] and nothing has changed. No attachment is visible with it.
Comment 13•1 year ago
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I can confirm this bug for Thunderbird 102.15.0 (64-bit) running on Linux (newly installed Linux Mint 21.3).
Both Apple Mail and Microsoft Exchange produce double MIME boundaries. Thunderbird should be more tolerant with handling incorrect MIME boundaries.
Description
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