> >Relay For Addresses? I'm using Relay For Addresses, and no one can
>relay through my mail server unless their IP is in the list. Just
>curious.
>
>IP spoofing?
FWIW, I haven't yet seen a case of a spammer that used IP spoofing.
It is technically possible, if you don't have a decent firewall (or have a
decent firewall, and a spammer that knows the "safe" IPs that you allow
mail from). However, with a decent firewall, the chances are extremely
slim that this would occur. IP spoofing requires quite a bit of knowledge,
and in any case the spammer would have no idea when you started blocking
their spam. So it would only be useful for spammers in rare cases.
-Scott
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