388562 - Embedded Background Images get treated as attachments

Status: RESOLVED DUPLICATE of bug 154836

(Thunderbird :: General, defect)

Description

[Peter Belm]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.0; en-GB; rv:1.8.1.4) Gecko/20070515 Firefox/2.0.0.4
Build Identifier: version 2.0.0.4 (20070604)

I'm trying to send automated HTML emails with inline CSS (for maximum compatibility), these inline CSS have background-image properties with correct 'cid:xxxxxx@xxxxx' strings, yet Thunderbird treats them as attachments and doesn't show them.

If I alter the message source and create an <img> with that cid as the source it works for that image.

Reproducible: Always

Steps to Reproduce:
1. Send a multipart alternative email with related images
2. Make the HTML of the email contain a style attribute like below:
"<div style="background-image: url('Fade.jpg'); background-repeat: repeat-x;">"
3. Make sure the image is embedded and that the style URL gets replaced with the "cid:xxxx..." link
Actual Results:  
This produces a otherwise correct HTML view, but without the background image.

Expected Results:  
The cid should be parsed and linked to the embedded image, consequently the image should not appear as an attachment.

Comment 1

[Henrik Skupin [:whimboo][⌚️UTC+1]]

Sounds like a dupe of bug 280480. Peter, please verify.

Comment 2

[Peter Belm]

No, this isn't about how Thunderbird sends emails, but how it parses them. The emails I'm sending contain correct CIDs in the background-image: url(), yet Thunderbird doesn't seem to recognise them as CIDs (presumably since it doesn't even try to).

The same email will work in Windows Mail (Vista Outlook Express). I shall attach an example soon.

Comment 3

[Peter Belm]

Attachment: Test Email

This is an .eml file that should show a fade background image, but doesn't due to the bug. Just open it with Thunderbird and Outlook for a comparison.

Comment 4

[Joe Sabash [:JoeS1]]

duping to bug 154836
Reporter if you disagree, please re-open.