Hello, can someone point me to some good sites/info/tut/documentation to the next item: I want to deny sending mails to a certain domain. A mail send to 'xxx.com' for example should be dropped. I can't find it. The issue is: MajorDomo gets a mail 'mailbox is full', majordomo responds: 'invalid responds', host replies: inbox full, etc. infinity loop. Any suggestions?