[IMail Forum] different relay options

[Damian Sanguine]

Hi, I was trying to determine which option should be the best to close the open relay that my mail server has. I know I MUST do it NOW but I have a lot of accounts created all over the world and I can not close by IP. I made all the people to use SMTP verify, so I can close the relay and let only the web server to relay on it.   My question is: what are the options relay for local users and local hosts? I do not understand the explanation from the manual (I'm sorry, I'm from Argentina :-) ).   can they help me?   Thanks, Damian