[CentOS] Re: DKIM

Wed Sep 24 19:04:15 UTC 2008
Scott Silva <ssilva at sgvwater.com>

on 9-24-2008 11:41 AM Ralph Angenendt spake the following:
> Scott Silva wrote:
>> AFAIR yahoo only looks for proper SPF records and then looks at content 
>> so far. My users interact with them all the time.
> Out of curiosity: What happens if you don't have SPF records?
> Ralph
Initially when I had to deal with sending to yahoo I would get a mix of mail 
dumping into the receivers spam box to downright rejections. Then it moved 
completely to rejections. I have exec's that send mail to all the big 
providers, usually to lawyers and lobbyists that are either too clueless or 
too cheap to have a better mail system. Aol and yahoo at the time just wanted 
SPF records and reverse DNS that resolves.

I have thought about DKIM in sending, but so far in using DKIM for receiving 
mail with spamassasasin I just get more false negatives with the yahoo spam 
because a lot of it actually is through their servers so it gets properly signed.
I initially wanted DKIM to resolve mails from our bank not getting mixed in 
with all the phishing attemps. Adding a little bit of negative score helps it 
get through, but now maybe I will have to add a meta rule on some common 
combinations to catch the yahoo spam.

MailScanner is like deodorant...
You hope everybody uses it, and
you notice quickly if they don't!!!!

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