How many? This many:

beastie# bzcat maillog.0.bz2 | grep relay=cyrus | wc -l
776

Rejects?

beastie# bzcat maillog.0.bz2 | grep reject | grep SMTP | wc -l
2381

UBEs? Infects? (*)

beastie# bzcat maillog.0.bz2 | grep UBE | wc -l
91
beastie# bzcat maillog.0.bz2 | grep INFECT | wc -l
79

(*): I have set up a pre-transfer filter that converts a great number of virus mails and UBEs to “reject” (450, and this will be sent again if the remote side is actually a mail server :-) )