Greylisting

My received spam counts have been exploding lately, so I’ve enabled greylisting on nuxx.net via postgrey. It’s too early to tell, but looking at mailgraph shows that delivered message counts are WAY down, spam detections have almost gone away, and rejection counts are way up.

The way this works is by telling mail coming from unknown places to go away and try again later. Most spamming software doesn’t bother trying again later, but proper mail servers do. After the proper mail servers try again the mail is delivered, and that server is noted as being safe. So, because of this, mail coming to those I host from new destinations may be delayed for 5-15 minutes, but it’ll eventually get through.

If I host you and you are suddenly not getting mail which you expect to get, let me know and I’ll sort it out. It should work fine, though, just be patient. I’ll post more in a day or so once I know for sure how much counts are down.

For reference, I personally have been receiving 300-500 pieces of spam (with most of it flagged by SpamAssassin) per day, and it was just getting to be a bit much.