On my server i'm using pop3 auth for smtp. Since this only require that the user have checked mail before sending - it's easy for end-users to understand.
I'm using David Harris' POP3 auth. It is plugin-play instead of patch'n-pray - http://www.davideous.com/smtp-poplock/. I have altered the check_relay plug-in so that it authenticates with pop3. It requires that David Harris' pop3 auth is set up on the server except the smtp-bit that are done in this plug-in. This is the first time i fiddle with plug-ins, but it seems to be working correctly. If anyone are interrested in the modified check_relay they can contact me at andreas at tx.no. Is there any way that i can run this as a seperate plug-in? I guess not since check_relay would deny the mail if they where seperate. -- Andreas Gunleikskaas http://txweb.no - webhotell/domenereg.