[Bug 1859011] Re: bounce mail processed multiple times -> oom crash of BounceRunner

[Michael Menge]

To clarify  some points:

1. the bounce mail is genuine. My logs show that a ~5MB mail was send to the 
list by the owner of the list, it was distributed to the members of the list,
and caused some bounce mails by some recipients. The mail that caused the 
problem was normal non delivery notification with the characteristic that 
the complete original mail was included as message/rfc822.

2. I don't know if the size of the bounced mail has an impact on the number 
of duplications, but the size combined with the duplications resulted 
in the bounce process requesting using ~20 GB of ram 

3. My logs indicate some cases with >2000 processed bounces that didn't crash 
the BounceRunner, most likely there was also a duplication, but the mail 
was smaller

At the moment I try to create a striped down version that I can share 
that reproduces the problem

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Title:
  bounce mail processed multiple times -> oom crash of BounceRunner

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