[kmail2] [Bug 446919] New: html body style bleeds into mail header

Mon Dec 13 09:33:37 GMT 2021

https://bugs.kde.org/show_bug.cgi?id=446919

            Bug ID: 446919
           Summary: html body style bleeds into mail header
           Product: kmail2
           Version: 5.19.0
          Platform: Archlinux Packages
                OS: Linux
            Status: REPORTED
          Severity: minor
          Priority: NOR
         Component: general
          Assignee: kdepim-bugs at kde.org
          Reporter: kde at boxie.eu
  Target Milestone: ---

Created attachment 144505
  --> https://bugs.kde.org/attachment.cgi?id=144505&action=edit
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 at 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

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