On 03/06/17 04:19, Matus UHLAR - fantomas wrote:
On 05.03.17 10:38, Marc Perkel wrote:
Well, new to me. Maybe others have thought of this.
Many domains send nothing but good email and if you whitelist them
based on FCRDNS all is good. Been doing that.
But ...
Many domains send nothing but good email and they send through
reputable email sender services which are mostly good by not perfect.
So can't just whitelist that.
What I'm doing now is whitelisting the domains that are good, but
doing SPF checks on the from address.
do you mean the header From: address?
because anyone doing SPF does spf checks does what you describe on the
envelope from: addres.
Yes - I'm using the headers From: address.
If the from address is whitelisted AND the SPF of the from address is
good - I pass the email.
or do you do this on MTA-level (which means it's off-topic)?
I do it at the MTA level - but it's not off topic because the concept
can be applied to spamassassin.
Also - I have almost 100,000 domains in my hostkarma.junkemailfilter.com
(127.0.0.1) rbl. So I'm passing a lot of good email with this trick.
--
Marc Perkel - Sales/Support
supp...@junkemailfilter.com
http://www.junkemailfilter.com
Junk Email Filter dot com
415-992-3400
