1681662 - Different (mobile?) display of Email in Thunderbird version 78

Status: RESOLVED DUPLICATE of bug 1659362

(Thunderbird :: Message Reader UI, defect)

Description

[badertscher]

Attachment: Comparison display email message Thunderbird Versions 78.4.3 and 68.12.1

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4350.2 Safari/537.36

Steps to reproduce:

Same email open with Thunderbird-Versions 78.4.3 and 68.12.1

Actual results:

The same email is displayed differently in Version 78 compared with previous version of Thunderbird (in the provided example single column layout instead of double column layout). It seems that Thunderbird V78 renders the content with the parameters from the mobile view. The source code of both email are exactly the same.

Test environment: Thunderbird 78.4.3 & 68.12.1, client used on Windows & MAC

Expected results:

The email should be displayed in the same layout as with the previous versions of Thunderbird (not using the mobile-view).

Issue is observed in the Newsletter-Email provided in this bug and in a newsletter received from a partner.

Comment 1

[Wayne Mery (:wsmwk)]

Please attach the email as a testcase .eml file

Comment 2

[badertscher]

Attachment: EML-File_Newsletter_Thunderbird_v68.12.1

Comment 3

[badertscher]

Attachment: EML-File_Newsletter_Thunderbird_v78.4.3

Comment 4

[badertscher]

Requested .eml-Files attached to the bug.