The following appeared in my logs:
May 28 01:08:24 smtp postfix/postscreen[12800]: CONNECT from
[59.7.57.23]:46426
May 28 01:08:24 smtp postfix/dnsblog[13615]: addr 59.7.57.23 listed by
domain bl.spamcop.net as 127.0.0.2
May 28 01:08:24 smtp postfix/dnsblog[13616]: addr 59.7.57.23 listed by
domain bl.spameatingmonkey.net as 127.0.0.2
May 28 01:08:24 smtp postfix/postscreen[12800]: CONNECT from
[59.7.57.23]:46428
May 28 01:08:24 smtp postfix/dnsblog[13615]: addr 59.7.57.23 listed by
domain b.barracudacentral.org as 127.0.0.2
May 28 01:08:24 smtp postfix/dnsblog[13585]: addr 59.7.57.23 listed by
domain psbl.surriel.com as 127.0.0.2
May 28 01:08:24 smtp postfix/postscreen[12800]: DNSBL rank 8 for
[59.7.57.23]:46426
May 28 01:08:24 smtp postfix/postscreen[12800]: DNSBL rank 8 for
[59.7.57.23]:46428
2 connections from the same IP. Both spamcop and spameatingmonkey have
weights of 2. As you can see, because the IP is tested twice, the total
of all tests are added to both connections.
Not a big deal in most cases, but thought I'd bring it up.