>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.

they you�re screwed.  relay for addresses and SMTP AUTH for everybody else 
is the ONLY way to go for security

>what are the options relay for local users and local hosts?

useless

Len

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