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From: Cy Schubert - ITSD Open Systems Group <cschuber@uumail.gov.bc.ca>
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To: Ahmad Lokman <alhh@alurtenaga.com.my>
cc: "'security@freebsd.org'" <security@freebsd.org>
Subject: Re: How to limit the size of the email from outside 
In-reply-to: Your message of "Mon, 16 Dec 96 00:02:06."
             <01BBEAE4.60915180@sting.alurtenaga.com.my> 
Date: Sun, 15 Dec 96 08:48:24 -0800
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> Here I would like to know if anyone out there know how to prevent someone
> sending a large file of email to an email server. This will prevent the
> guy from jamming the server. Please give me any suggestion on this matter..

Try Maxsize in your Mlocal and Mprog statements.

This is what I use on my DEC Alpha desktop at work.

Mlocal,         P=/bin/mail, F=lsDFMrmn, S=10, R=20/40,
                Maxsize=1000000,
                A=mail -d $u
Mprog,          P=/usr/local/sendmail/smrsh, F=lsDFMeu, S=10, R=20/40, D=$z:/,
                Maxsize=1000000,
                A=sh -c $u

This limits incoming mail processed by by smrsh and /bin/mail to 1 million
bytes.

You can do the same with the Mstmp, Mesmtp, and Mrelay statements to limit
the size of outgoing mail as well.


Regards,                       Phone:  (250)387-8437
Cy Schubert                    OV/VM:  BCSC02(CSCHUBER)
Open Systems Support          BITNET:  CSCHUBER@BCSC02.BITNET
ITSD                        Internet:  cschuber@uumail.gov.bc.ca
                                       cschuber@bcsc02.gov.bc.ca

		"Quit spooling around, JES do it."