>Anyone suggest the best way to close open relays
There are only 2 ways to close open relays:
To not be an open relay, you can either use IMail's "Relay for addresses"
(in which case you would enter a list of "safe" IP addresses that your
users may come from; anyone not coming from those safe IPs would need to
use SMTP AUTH), or "No mail relay" (which really means that everyone must
use SMTP AUTH). Note that relay setting apply only to outgoing E-mail, so
no matter what your settings are, your users will still be able to get mail.
There's no "best" way, just "the" way.
>but still allow multiple domains to send email and recieve email without
>any smtp authentication!
If you need to close your open relay (which you do), and you can't force
users to use SMTP AUTH, then you will have to identify them based on their
IP address range(s), using the "Relay for Addresses" option.
-Scott
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