Authenicating users

[Doc Schneider]

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I'm running MS on my secondary MX server and was wondering if there is a
way for it to (possibly through a map file?) find the valid users for
the domains I secondary. I would like  to stop the spammers from hitting
me with, literally, thousands of dictionary (unknown users) attacks?

I'm using all kinds of RBLs and blacklists but still getting a lot
slipping through.

Oh running Sendmail 8.13.4 on it as well. With delay_checks, greet_pause
and all the goodies.

I'm not running an LDAP server, but could I suppose for this.

TIA,


-Doc

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