This issue is getting more annoying. I run a postfix server on centos.I opened my maillog 4-5 days ago and noticed my server was being flooded with relayed emails. I check for viruses and a hundred other things. I think I have relays disabled. but from what it looks like, These emails are coming in FROM a fake email address from my domain ie. my domain is gigreview.... and these fake emails are from fake_user@gigreview...... This has lagged my server a little bit, and also noticed that my servers IP address has been banned from a few email server. I have tried a few other things such as using smtpd_sender_restrictions and smtpd_client_restrictions in my main.cf but anything that is spose to work, has "reject" in the line, when ever i have reject in the line, all proper incoming emails are rejected instead.. Can some one help with this issue??