[qw]

I tried that too 15 years ago, but had to stop after a year. It turns out many spammers send mails to random usernames

[roblabla]

So far spam hasn't been a problem (I get none). I have spamassassin set up, but it doesn't filter anything for now, just scores stuff. If it ever gets to the point where I get too much spam, I'll probably start to filter it.