Re: DMARC, Yahoo and mailing lists

[Walter Moore <moorewr () ECKERD EDU>]

We feel your pain. One set of mailing lists in particular has a large group
of AOL and yahoo users, and was greatly impacted. We dealt with the
situation in the short-term by using the option to remove the sender's
mailing address for one of those lists. This of course caused new problems
with senders not identifying themselves, so it was purely a temporary
measure.

If anyone started converted from a packaged mailman (RHEL in our case) to
one they compiled I'd be curious to hear about your process. We have ours
ready to go but had some outside factors that made us delay the switch.

In our case we think will build the new version to use the same locations
as the RHEL package:
'./configure'  '--prefix=/usr/lib/mailman'
'--localstatedir=/var/lib/mailman' '--sharedstatedir=/var/lib/mailman'
'--with-urlhost=[fqdn]'


On Wed, Jun 18, 2014 at 8:11 PM, Andrew Daviel <advax () triumf ca> wrote:

> Has anyone had problems with Yahoo email users and mailing lists since
> April, and if so what did you do about it ?
>
> http://blog.threadable.com/how-threadable-solved-the-dmarc-problem
>
> Apparently there's a patch available for mailman, but I haven't tried it
> yet.
>
>
> I hadn't been made aware of any mailing list problems here, but now I
> start looking into it with some test accounts, it seems I cannot send a
> message via mailman from a yahoo account to another yahoo account, or from
> a yahoo account to a hotmail account. Not just being filtered as spam, but
> actually getting an SMTP rejection.
>
>
> When I check, I see that at least the following now have "reject" DMARC
> records:
> facebook.com
> linkedin.com
> paypal.com
> yahoo.com
> twitter.com
>
> viz. DNS TXT records for xxx.tld, e.g. "host -t txt _dmarc.yahoo.com"
> or "dig +short -t txt _dmarc.twitter.com"
>
> This probably has implications for Unix-style mail forwarding, too -
> forwarded linkedin and facebook notifications may fail if the target domain
> implements DMARC filtering.
>
>
> --
> Andrew Daviel, TRIUMF, Canada
> Tel. +1 (604) 222-7376  (Pacific Time)



-- 
+-----------------------------------------------------------------+
Walter R. Moore --  Sr. Systems Administrator, Eckerd College
moorewr () eckerd edu --  http://home.eckerd.edu/~moorewr

"It was glorious to see -- if your heart were iron,
And you could keep from grieving at all the pain" - The Iliad (13.355)

I'm on twitter: http://twitter.com/moorewreckerd

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