[BlueOnyx:19555] Enforcing SPF

[Ernie]

Is there any easy way to enforce incoming emails to be checked and recjected
if they don't come from a valid email server that is listed in the SPF
records for the domain?

Recently there seems to be a huge increase of self-spam that is emails which
pretend to be from the intended recipients email address.

I figure that enforcing SPF records might be a good way to deal with that.

Training something bayesian like spammassassin doesn't deal with it verty
well, it would be nice to stop it at the MTA level.


- Ernie.