Greg is kind enough to let me shack up on his server and today he sent a bit of info he noticed when checking the logs:
[root@eod log]# grep 'Jun 7' maillog | grep haughey\.com | \ grep 'User unknown' | wc -l 5678
[root@eod log]# grep 'Jun 7' maillog | grep metafilter\.com | \ grep 'User unknown' | wc -l 12976
That's the total number of messages (in one day) going to anything@my domains that I previously told him to ignore and send to /dev/null.
That's 18,654 spams going to non-existent email addresses. Greg says about 700 come in each day to my real matt@ accounts, and of those 700 only about 40 are legit. Gmail does a fairly good job screening the remaining, but it's far from perfect. I probably wade through 100 spams a day to see my real mail.
It's nice having the same email address for the past 9 years, but jeez, filtering 19k emails a day down to 40 is pretty messed up.