[Gluster-infra] [gluster-infra] The black art of mailing lists?

[Michael Scherer]

Le lundi 13 février 2017 à 14:36 +0100, Michael Scherer a écrit :
> Le lundi 13 février 2017 à 02:09 +0100, Michael Scherer a écrit :
> > Le samedi 11 février 2017 à 01:51 +0100, Amye Scavarda a écrit :
> > > Hey there,
> > > Getting a few pings on 'I've been unsubscribed from gluster-users@'  - and
> > > my mailman-fu is pretty limited.
> > > 
> > > Anyone noticed anything odd in the mailman install? This started on
> > > Thursday, Feb 9 as far as I can tell.
> > 
> > Hi,
> > 
> > mailman processes are here, so could you provides a bit more information
> > like "who did ping" (so we can start to see if there is a pattern, etc),
> > or even better, direct people to contact the list and/or open a bug
> > report so this can be tracked properly ?
> 
> So, I did search more after reading all my emails, and the answer is
> long but can be summarized by "yahoo and google suck, and we are in the
> middle".
> 
> It seems that someone used a yahoo email to post on gluster-users. So
> far, so good, but Yahoo do have a specific DMARC policy that prevent
> sending email from yahoo from a non yahoo server. It also break mailling
> lists for provider who do respect DMARC policy:
> https://thehackernews.com/2014/04/yahoos-new-dmarc-policy-destroys-every.html
> 
> And among the ones that do strongly verify DMARC (instead of using it as
> a indicator, since that's slightly less prone to breakage) is gmail, who
> just block at the smtp level mail if the dmarc policy say so.
> 
> 
> Usually, this is not a problem, since email just get dropped after a
> while. 
> 
> But this time, my hypothesis is that the person who did post did send
> enough to trigger a threshold in mailman to unsubscribe people (ie, more
> than 5 bounces). So all the gmail subscribers got removed.
> 
> But we have logs, so I am gonna resubscribe everybody.
> 
> From here, we have several solutions:
> - raise the bounce limit to 10. This doesn't fix the issue, but should
> minimize it for the time being 
> 
> - make sure people who use yahoo email can't subscribe. If their email
> provider break the list and can't work, we can't do much

So while I didn't unsubscribe anyone, i did contact the user to explain
his options (especially the part where we can't do much on why 1/3 of
the list do not get his email :/ )

-- 
Michael Scherer
Sysadmin, Community Infrastructure and Platform, OSAS


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