>Problem with "relay for addresses" is that I cant guarantee that users will
>always come from the same ISP and hence, the same ip or ip range.
If you are saddled with the difficult-to-shake legacy of users whom
you can't switch to SMTP AUTH, then ok, but you must assume that will
get hijacked and spammed, sooner or later. ie, the inconvenience of
the users in now learning how to use a secured mail server is weighed
agains the your inconvenience (and theirs) when a spammer or bomber
or whatever slows down or stops your server.
Len
http://BIND8NT.MEIway.com : Binary for ISC BIND 8.2.3 T9B for NT4 & W2K
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