[Bug 1496620] [NEW] Mailman sometimes fails to remove redundant Re: when prefixing subject.

[Mark Sapiro]

Public bug reported:

When processing the subject_prefix for list mail, Mailman attempts to
remove all the redundant Re: bits in the Subject. Under some
circumstances this can fail resulting in messages being delivered to the
list with subjects like, e.g.,

Subject: [prefix] Re: Re: Re: Re: some message subject

Of course, it was a user's MUA that created a subject with multiple Re:
to begin with, but it may not have been so blatant before prefixing
manipulations.

** Affects: mailman
     Importance: Low
     Assignee: Mark Sapiro (msapiro)
         Status: New

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https://bugs.launchpad.net/bugs/1496620

Title:
  Mailman sometimes fails to remove redundant Re: when prefixing
  subject.

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