Rejecting unknown Users

[Holger Banko]

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Hello everybody,

we use SuSE 9.1 and an actual Mailscanner in front of our Louts Notes
Mailserver.

As I can see in the /var/log/mail logfile, we have a lot of trouble with
dictionary attacks. The Notes server is rejecting all unknown users so I have
an always full outgoing que.

Is it possible to already reject all unknown users by the Mailscanner System?
I can access the LDAP Directory of the notes server. Or just create an "valid
users file" and point the Mailscanner/Sendmail to it.

But I dont know how. I dont have much experience in configuring sendmail.

Thanks in advance you for your help
--
Holger Banko
IT-Administrator

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