Today is the first complete (almost) day when my mail server adopted new antispam filtering rules (see the diary entry from yesterday).
Here is the small statistics:
s:/var/log # grep "Feb 23 " mail|grep -c status=sent 681 s:/var/log # grep "Feb 23 " mail|grep -c reject: 2297 s:/var/log # grep "Feb 23 " mail|grep -c "User unknown in local recipient table" 2158681 possibly valid e-mails delivered (~50 of them being marked as spam via spamassassin on my machine) and 2297 invalid e-mails. 2158 of them (94%) with non-existent e-mail address in To:, 117 HTML e-mails (5%), 3 e-mails with ADV in the subject (directly discarded) and the rest was sent with non-existent domain of the sender.
This is quite positive. Really interesting is also the statistics of e-mails with invalid To:. There are only five valid e-mails in the domain janik.cz and there are unbelievable amount of delivery attempts to non-existent e-mails:
163 dhinds 103 honey 82 pittman 79 Schroeder 75 devinscottch 75 cvjbOf course those e-mails are imaginary and they never exist on my systems.
To summarize: never ever setup so called domain wide e-mail when you accept/deliver all *@domain to one mail box. Czech Telecom presents this service (doménový koš in Czech) as a big advantage of their offers. Never believe them ;)-----