Re: [Exim] HELP: Rejecting mail from unresolvable domains

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Author: Philip Hazel
Date:  
To: Suresh Ramasubramanian
CC: Exim Users
Subject: Re: [Exim] HELP: Rejecting mail from unresolvable domains
On Wed, 22 Nov 2000, Suresh Ramasubramanian wrote:

> Hassle is, this waits for the DATA command and accepts the mail before giving a
> 4xx series error when accepting mail from an unresolvable domain. This is a
> total waste of bandwidth when dealing with a spammer who dictionary attacks
> your server :(


Try it twice. You will find it is different the second time. (Or at
least, it should be.) Read section 42.2 of the manual, which explains
this.

-- 
Philip Hazel            University of Cambridge Computing Service,
ph10@???      Cambridge, England. Phone: +44 1223 334714.