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Chris: I'm picking my way through unfamiliar terminology here, but we're a
very small shop and don't have a separate mail gateway. If I understand
our config correctly, our i5 smtp server grabs anything that the router
sends to that particular IP address. The email is immediately accepted or
rejected depending on whether there is an SDD entry.
Is this true? It will definitely reject mail address to a user with no SDD entry -- and it'll do it immediately (not by sending back a message)? Did you test that?
I didn't think the SMTP server knew anything about SDD entries.
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