[Bug 768744] Access to Mailman logs to investigate users who claim to have been unsubscribed from evolution-list@ without knowledge

["sysadmin" (GNOME Bugzilla) <bugzilla gnome org>]

Comment # 3 on bug 768744 from Patrick OCallaghan

(In reply to Andrea Veri from comment #2)
> The problem was related to multiple bounces being received from the
> mentioned addresses.
> 
> What I'd suggest would be giving [1] a look and eventually increase the
> bounce score to more than 3.0 (which equivs to 3 bounced e-mails as it
> increments by one at each bounce).
> 
> [1]
> https://mail.gnome.org/mailman/admin/evolution-list/?VARHELP=bounce/
> bounce_score_threshold

I turned on notifications for when this happens, and so far almost all cases
seem to be bounces from Yahoo, including supported domains such as
bellsouth.net, pacbell.net, yahoo.co.uk etc. It has been suggested that this is
caused by Yahoo's DMARC policy, so tweaking the bounce variables isn't going to
fix it. Unfortunately the only countermeasures are a) rewriting From addresses
when DMARC-enabled domains are the target, or b) users changing their email
providers. Neither seems acceptable.

This is presumably being seen on other lists besides the Evolution one, so
perhaps list admins should be notified.

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