>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...
Good! Open relays *need* to be closed.
> but I have a lot of accounts created all over the world and I can not
> close by IP.
You can use "Relay mail for Addresses" (entering some of the IPs that you
know). The rest of the users can use SMTP AUTH.
>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.
Good.
>My question is:
>what are the options relay for local users and local hosts?
They are options that give you a false feeling of security, but still let
spammers send mail through your server. "Relay for local users" means the
spammer has to use an address at your domain, such as
"[EMAIL PROTECTED]". "Relay for local hosts" means that the
spammer has to use a return addess (that doesn't have to exist) at your
domain. Either way, it makes things worse for you when a spammer does his
thing.
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