Mangled From address in mailing list distributed message turned it into spam

Colin Watson cjwatson at ubuntu.com
Tue Oct 15 09:13:44 UTC 2019


On Tue, Oct 15, 2019 at 12:12:16AM +0200, Ralf Mardorf via ubuntu-users wrote:
> On Tue, 15 Oct 2019 06:00:16 +0800, Bret Busby wrote:
> >I am assuming that the mangled From address of the message below, is
> >why gmail designated the message as spam.
> 
> Several mails contain the "via ubuntu-users" sender.

This is a mitigation applied for messages from domains that publish a
DMARC policy, since otherwise mailing list delivery breaks.  For
technical details, see:

  https://wiki.list.org/DEV/DMARC

-- 
Colin Watson                                       [cjwatson at ubuntu.com]




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