[Bug 1246039] [NEW] Non-standard headers can leak sender information to anonymous lists.

[Mark Sapiro]

Public bug reported:

Various MUAs, MTAs and MDAs can add non-standard X- headers to messages,
e.g. X-Envelope-Sender, that might reveal sender information in posts to
anonymous lists. Since it is not possible to know what all these headers
might be, it is not possible to explicitly remove them. Thus, we will
instead use a configurable list of headers to keep and remove the rest.

** Affects: mailman
     Importance: High
     Assignee: Mark Sapiro (msapiro)
         Status: Fix Committed


** Tags: mailman3

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https://bugs.launchpad.net/bugs/1246039

Title:
  Non-standard headers can leak sender information to anonymous lists.

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