[Akonadi] [Bug 433912] New: Recipients randomly dropped during SMTP Transaction

[Jayesh Badwaik]

https://bugs.kde.org/show_bug.cgi?id=433912

            Bug ID: 433912
           Summary: Recipients randomly dropped during SMTP Transaction
           Product: Akonadi
           Version: 5.16.1
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: major
          Priority: NOR
         Component: Mail Dispatcher Agent
          Assignee: kdepim-bugs at kde.org
          Reporter: j.badwaik at fz-juelich.de
  Target Milestone: ---

SUMMARY
Recipients are randomly dropped during the SMTP transaction even though they
are preserved in the message body. This causes messages to be undelivered to
only some of the recipients.

Since this is a random bug, this is not reproducible. The logs I have contain
personal information which I am not comfortable sharing in the public domain
but I can mail this to a developer if required. 


STEPS TO REPRODUCE
1. Send a mail to multiple recipients.
2. Check the SMTP log obtained by setting KSMTP_SESSION_LOG
3. Look at `C: RCPT TO:` fields.
4. Compare them with `To:` fields. 
5. Sometimes, randomly, there is a discrepancy.


OBSERVED RESULT
1. Number of `C: RCPT TO:` entries should match the `To:` fields.  

EXPECTED RESULT


SOFTWARE/OS VERSIONS

Linux/KDE Plasma: 
KDE Plasma Version: 5.21.1
KDE Frameworks Version: 5.79.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION

If someone can point me to the code which actually deals with the SMTP
sessions, I can look at it and try inspecting the logic myself.

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