[Chat] DKIM signatures

[Russell Coker]

On Tuesday, 3 January 2017 11:04:21 PM AEDT Russell Coker via Chat wrote:
> Jan  3 11:17:20 smtp postfix/smtpd[10399]: 9C35AEC65: 
> client=mailhost.linux.org.au[192.55.98.181]
> Jan  3 11:17:20 smtp postfix/cleanup[10416]: 9C35AEC65: message-
> id=<1483401426.15071.9.camel at samba.org>
> Jan  3 11:17:23 smtp opendkim[707]: 9C35AEC65: s=42627210 d=samba.org SSL
> Jan  3 11:17:23 smtp opendkim[707]: 9C35AEC65: bad signature data
> Jan  3 11:17:23 smtp postfix/cleanup[10416]: 9C35AEC65: milter-reject:
> END-OF- MESSAGE from mailhost.linux.org.au[192.55.98.181]: 5.7.0 bad DKIM
> signature data; from=<chat-bounces at lists.lca2017.linux.org.au>
> to=<russell at coker.com.au> proto=ESMTP helo=<mailhost.linux.org.au>
> 
> It looks like the admin team didn't succeed in making mailman remove DKIM 
> headers, either that or opendkim is logging a DMARC failure as a bad 
> signature.
> 
> From reviewing my logs it appears that I was the only person sending mail
> to  the list recently who had ADSP enabled but not DMARC.  I did that
> because in the past using DMARC caused people to get unsubscribed from the
> linux-aus list (some receivers check DMARC not ADSP).  I've enabled DMARC
> which will help mail get through this list if Simon's suggestion is
> followed, but might cause problems for other people if there's a discussion
> on linux-aus that interests me.

https://dmarc.org/

I have finally received a message I wrote back from the list server.  So 
things are working OK as long as everyone who uses DKIM also uses DMARC.  If 
you use this list and have DKIM enabled without DMARC then you need to visit 
the above page ASAP.

-- 
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