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From: "Simon Gray" <simong@desktop-guardian.com>
To: "faisal gillani" <fasi_74@yahoo.com>
References: <20031118060858.12943.qmail@web11001.mail.yahoo.com>
Date: Tue, 18 Nov 2003 14:08:08 -0000
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cc: questions@freebsd.org
Subject: Re: OK ! how to limit number of recipient on can send mail
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Hi,

> Ok
> I want my sendmail users to only sendmail to a limited
> recipient .. for example he can only send mail to max
> 15 recipient within one mail .. so that i can limit
> out spam attemps .. it this possible in sendmail ?

I've not used sendmail in years, but I do recall within sendmail.cf you
should be able to add:

MAX_RCPTS_PER_MESSAGE=15

I think that'll work.

Also a quick look in google found : http://www.sans.org/rr/papers/19/582.pdf

It's not directly aimed at the MAX_RCPTS_PER_MESSAGE values but does include
some other techniques for preventing spam which may be of some use.

Hope this helps,

Simon