According to blizzard @
>Does anyone know of any mail system or firewall that implements this? I
>to remember that Microsoft Exchange server's SMTP gateway allows you to
>this, which is hilarious considering Microsoft's poor reputation for
>From what I understand they did not design it that way. It simply is
a side effect of exchange being able to relay smtp traffic.
Brett Lymn, Computer Systems Administrator, AWA Defence Industries
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