[kmail2] [Bug 448674] New: Spam false-positive, because link's href & text capitalization mismatch

[ratijas]

https://bugs.kde.org/show_bug.cgi?id=448674

            Bug ID: 448674
           Summary: Spam false-positive, because link's href & text
                    capitalization mismatch
           Product: kmail2
           Version: unspecified
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: kdepim-bugs at kde.org
          Reporter: me at ratijas.tk
  Target Milestone: ---

SUMMARY

KMail detected that an email to Qt [Interest] mailing list might be spam
(again), this time because one of the links in mail body was an HTML link with
text and href attribute set separately:

> Please visit <a h=
> ref=3D"https://bugreports.qt.io/browse/QTBUG-99195" target=3D"_blank" title=
> =3D"https://bugreports.qt.io/browse/qtbug-99195">
> https://bugreports.qt.io/browse/QTBUG-99195</a> and provide your use cases =

This email can be viewed on the web.

1. Plain text:
https://lists.qt-project.org/pipermail/interest/2022-January/037879.html
2. HTML:
https://lists.qt-project.org/pipermail/interest/attachments/20220117/02bb676c/attachment.htm

STEPS TO REPRODUCE

1. Open this email in KMail

OBSERVED RESULT

> Details:
> This email contains a link which reads as 'https://bugreports.qt.io/browse/qtbug-99195' in the text, but actually points to 'https://bugreports.qt.io/browse/QTBUG-99195'. This is often the case in scam emails to mislead the recipient

EXPECTED RESULT

This is not a spam.

SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.24.80
KDE Frameworks Version: 5.91.0
Qt Version: 5.15.2
Kernel Version: 5.16.0-arch1-1 (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i7-6700HQ CPU @ 2.60GHz
Memory: 15.6 GiB of RAM
Graphics Processor: NVIDIA GeForce GTX 970M/PCIe/SSE2

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