I would dedicate an alias for the rua, in case there is a surge, it is easy to 
then put aside reports.

I would not use sp=none, but create a specific DMARC record for 
lists.blystone.net<http://lists.blystone.net>, because with sp=none, then any 
subdomain is not protected anymore, while you just want one...

you can remove adkim=r; aspf=r; ri=86400 because that's the default values 
anyhow

pct=50 I suppose you are transitionning to quarantine, get to 100 as soon as 
possible.

if you run you own mailman, suggest you upgrade to 2.1.17 and consider enabling 
the DMARC option.

I'm not sure where you are in DMARC, but may be you should have started with 
p=non, collect some reports, assess and then move to more stringent policy.

Cheers


On Dec 17, 2013, at 5:13 AM, Scott Blystone 
<[email protected]<mailto:[email protected]>> wrote:

All,

This is my first post to the list and I really hope that this message does not 
go into quarantine or worse. I've had SPF and DKIM enabled on this primary 
domain, blystone.net<http://blystone.net/>, for some time and have only 
recently decided to implement DMARC. The domain and this subdomain, 
lists.blystone.net<http://lists.blystone.net/>, are both hosted on Google Apps. 
I've been studying up on DMARC and am generally aware of the issues with 
mailman. I've also heard that there are some issues using Google Apps with 
DMARC but those references seem to bit hazy.

Here's my current DMARC record: v=DMARC1; p=quarantine; 
rua=mailto:[email protected]<mailto:[email protected]>; adkim=r; aspf=r; 
pct=50; ri=86400; sp=none

Is this going to work reasonable well within mailing lists or do any of you 
have any additional suggestions for me?

Thanks!

--
Scott Blystone
Rochester, NY, US

CAcert Assurer (see http://www.cacert.org<http://www.cacert.org/>)
StartSSL Notary (see http://www.startssl.org<http://www.startssl.org/>)
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