How can I prevent my server running IMail 8.22 from accepting
messages from external hosts where the from has my domain, robinsonmfg.com?
It should receive messages from robinsonmfg.com from only one host
and that host is internal.
There are two kinds of envelope sender forgery here
1. forgery of [EMAIL PROTECTED]
this is always rejectable reliably. the SMTP service needs to check
the my.domain's list of users before accepting.
2. forgery of [EMAIL PROTECTED]
.... is a little risky since you might have roaming users that send
through Imail using their Imail account. But with no roamers, then
the policy would be "if not my_networks AND from: my.domains, then reject.
I don't think either of theses policies are possible on Imail, but
they are on IMGate.
Perhaps IMails SAV could be rigged at least to
reject [EMAIL PROTECTED]
Len
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