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.
If the from address is whitelisted AND the SPF of the from address is
good - I pass the email.
I'm still experimenting with this but I think I'm onto something.
--
Marc Perkel - Sales/Support
supp...@junkemailfilter.com
http://www.junkemailfilter.com
Junk Email Filter dot com
415-992-3400
