More on spam filtering: SPF disabled, greylisting probationary

After some concerns voiced by clients we’ve disable the SMTPd implementation of SPF, and will probably do so until it is more mainstream and less controversal. It however is still available as a SpamAssassin rule whose score can be configured.

Also after some concerns about greylisting, we’ve decided to run it in a “training” period to minimize downtime. After we believe training has been sufficient and we’ve received no complaints it will be turned on in full.