490640 - Attachment not shown for messages with Content-Type: multipart/related;

Status: RESOLVED INVALID

(Thunderbird :: Mail Window Front End, defect)

Description

[Ryan]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.9) Gecko/2009040821 Firefox/3.0.9 (.NET CLR 3.5.30729)
Build Identifier: version 2.0.0.21 (20090302)

Icons/attachments are not shown for messages containing a content type of "multipart/related". Manually editing the inbox file to change the content-type to "multipart/mixed" works. The icon is now visible and the attachment can be opened. I performed a search/replace on every instance and all affected messages are now showing properly.

Reproducible: Always

Steps to Reproduce:
1. Open email with email attachment of Content-type: multipart/related
2. Notice no attachment icon, no visible attachment
Actual Results:  
Message not showing attachment

Expected Results:  
Expected the message to show an attachment

Comment 1

[rsx11m]

The icon should show up when you switch to View > Message Body As > Plain Text.

Per standard definition, an image part within "multipart/related" containing a "Content-ID:" with a corresponding <img src="cid..."> entry in the text/html part are part of the message rather than an attachment. That should be the reason for an attachment icon not being shown if the message is displayed in HTML mode, where the image is part of the message body.

Thus, if "attachment not shown" refers to the attachment icon rather than the image itself not being displayed in the message, your observation is likely the intended behavior.

Comment 2

[Ludovic Hirlimann [:Usul]]

(In reply to comment #1)
> The icon should show up when you switch to View > Message Body As > Plain Text.
> 

Ryan can you try this and tell us if that works ?

Comment 3

[Ryan]

I can't really tell you if it would have worked. I just sent a pdf to another address of mine and everything showed fine regardless of the setting; the icon was present in the mail list; the file was available upon opening the email. Upon checking the source of the email, I found that the attachment was sent as multipart/mixed, which has not been having problems. It seems to me that multipart/related is not being handled correctly. I don't know of any other way to test it as I don't know how an attachment is sent as "multipart/related"

Comment 4

[rsx11m]

PDF files cannot be sent as part of the message body (at least not with Thunderbird), but you can drag-and-drop an image from your desktop into a message you compose (not into the attachment area) and send it to yourself, this should produce a multipart/related HTML message for testing.

Comment 5

[WADA:World Anti-bad-Duping Agency]

No response to question about "Message Body As/Plain Text" for more than one year, and wrong checking of comment #3.
Closing as INVALID.
Bug opener, re-open bug, if INVALID will be found invalid, please.