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

[Amye Scavarda]

On Mon, Feb 13, 2017 at 7:50 AM, Michael Scherer <mscherer at redhat.com>
wrote:

> 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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>

Much appreciated on the dig into this.
I maintain that this is still a black art.
- amye

-- 
Amye Scavarda | amye at redhat.com | Gluster Community Lead
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