Bug 446919

Summary: html body style bleeds into mail header
Product: [Applications] kmail2 Reporter: Christian Spanier <kde>
Component: generalAssignee: kdepim bugs <kdepim-bugs>
Status: REPORTED ---    
Severity: minor    
Priority: NOR    
Version: 5.19.0   
Target Milestone: ---   
Platform: Arch Linux   
OS: Linux   
Latest Commit: Version Fixed In:
Attachments: render bug of email header information

Description Christian Spanier 2021-12-13 09:33:37 UTC 
Created attachment 144505 [details]
render bug of email header information

SUMMARY
I noticed that some specific (spam) mails mess up the mail header (containing from, to, and date information, see screenshot). So I created a reproducible test case that illustrates the issue. It is the 
<body style="line-height: 0;margin: 0;padding: 0;background-color: #FFFFFF;">
that breaks rendering.

STEPS TO REPRODUCE
1. Send custom HTML mail using msmtp (or similar):
```bash
cat << EOF | mail -M "text/html" -s "Test" YOUR@MAIL.ADDRESS
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta charset="UTF-8">
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <title>Test</title>
</head>
<body style="line-height: 0;margin: 0;padding: 0;background-color: #FFFFFF;">
</body>
</html>
EOF
```
2. check your mails

OBSERVED RESULT
see screenshot

EXPECTED RESULT
readable lines.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 5.23.4
KDE Frameworks Version: 5.88.0
Qt Version: 5.15.2
Comment 1 Christian Spanier 2021-12-13 09:48:10 UTC 
Might be related to 441829 and 429393, but they overlap other HTML elements on top of the header.
This bug is specifically about CSS body styles that bleed into the header.