I think the only way of spam blocking is that all mail servers should require that every mail send via SMTP only is possible with a login/password combination just as POP3 connections. Every mailclient has this possibility built in.
Our customers have to do this btw... Johan To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
