Embed Notice

something interesting I discovered is that the combination of
- greylisting (telling senders that are suspicious but not obviously spammers to retry in a few minutes)
- rejecting non-well-formed HELO hostnames
- rejecting clients that pipeline message data without even listening to your greeting
has reduced the amount of spam i receive (at the MTA) to essentially zero. i got one single message since i set this up. normally i get ~50 per day!