hello, I hope you can help me, my problem is spam, I use debian + ISPConfig and so far it works great, but the spam filter is increasingly hard, and my problem is reaching the mail server with messages such as non-existent domains me comes a couple of accounts viagra propaganda, but with the sender [email protected] that does not exist thanks now and apologize for my language use google translate
Please have a look here: http://www.howtoforge.com/block_spam_at_mta_level_postfix This configuration is compatible with ISPConfig.