[Mimedefang] Dictionary attacks, NDRs etc..

[David F. Skoll]

On Fri, 5 Dec 2003, Cahya Wirawan wrote:

> I read from http://postfix.state-of-mind.de/patrick.koetter/mailrelay/
> that a ldap lookups directly to exchange server is not really
> recommended because during dictionary attack there will be
> tausend of ldap queries in a minute,

Use Sendmail's MaxRecipientsPerMessage and and BadRcptThrottle settings
to prevent this.

--
David.