723851 - Attachments are not shown in some mails

Status: RESOLVED DUPLICATE of bug 674473

(Thunderbird :: General, defect)

Description

[flack]

Attachment: One of the offending emails, with sensitive information removed

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:10.0) Gecko/20100101 Firefox/10.0
Build ID: 20120129021758

Steps to reproduce:

I regularily receive emails with automatically generated PDFs as attachments. When I open these mails in Thunderbird, the attachments are not visible. When I open the same mail in my webmail client (roundcube), they work as expected


Actual results:

This used to work in Thunderbird 3 (not sure which version exactly). In later versions, the attachments became invisble. I thought I found a ticket regarding this once and it said it should be fixed in version 10, but since I'm now using version 10 and the problem still persists, I'm opening a new report


Expected results:

The attachments should have been displayed, or at least some indication that Thunderbird can't read the mail and that some parts might be missing

Comment 1

[flack]

This happens to me on Linux and on Mac OS, haven't tried Win, but I guess it's the same

Comment 2

[flack]

Attachment: Mail display in Thunderbird

This is how the mail is shown in Thunderbird

Comment 3

[flack]

Attachment: Mail display in Roundcube

This is the same email in Roundcube (not how the attachment is visible, while there's no indication in thunderbird)

Comment 4

[rsx11m]

> Content-Type: multipart/related; boundary="_----------=_132552248930567"

> --_----------=_132552248930567
> Content-Transfer-Encoding: base64
> Content-Type: application/pdf; name="AAA000045108295.pdf"

The PDF attachment is in a multipart/related context (should be multipart/mixed) without being referenced to, so that's technically an invalid message. However, given that apparently quite a few mail programs/systems are using this construct, there is a bug report pending with patch up for review to cover this case.