The /etc/sendmail.cf file has MaxMessageSize= variable but is commented out
by default. Is it possible that someone has set this variable to 6000000 and
forgot about it?
Eddie Strohmier
----- Original Message -----
From: "Dan Horth" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Friday, September 15, 2000 8:34 PM
Subject: Sendmail rejecting large messages issue
> Hi all - another rambling brain dumb on issues I've been thinking
> about regarding our server systems...
>
> We have a cap on our max message size accepted by sendmail because
> we're on a slow link and we pay by transfer amount - so we try to
> discourage our friends from sending us 20MB MPEG movies (unless
> they're really good! :)
>
> Anyway - since we've started doing mail relaying for a client we've
> noticed a few of these "message rejected because it is too big"
> messages from sendmail...
>
> Sep 16 02:41:07 server sendmail[4577]: AAA04577: message size
> (7376264) exceeds maximum (6000000)
>
> I was just wondering if someone could clarify as to whether sendmail
> would have received 6000000 bytes of the message before realising it
> was too big and rejecting it... or would it have rejected it before
> any data was transferred?
>
> I tried some tests with sending myself large messages from other
> hosts on our local net and remotely - and the message gets rejected
> by sendmail in the initial handshake - with no mention of a rejection
> in the log files...
>
> I'm wondering if this is because the servers are all redhat 6.2 based
> systems and as such sendmail is doing some 'clever' checking before
> initiating transfers - hence the immediate rejection and no mention
> in the logs. The servers we're seeing rejection notices may be
> running other transport mechanisms which aren't checking with
> sendmail before starting the transfer and start sending blindly
> before sendmail on our server cuts them off at teh 6Mb limit...
>
> but then how does sendmail know the total message size to report it
> in the logs?
>
> hmm... going round in circles with this one - hopefully some sendmail
> guru will be able to fill me in a bit on the mechanisms involved.
>
> Oh yeah - one other question - is there a way for me to customise the
> rejection messages sendmail gives with "message too large" or
> "unknown user" or "we don't relay" or other errors returned to people
> trying to send us mail?
>
> TIA for any insights... or even pointers to somewhere more
> appropriate for this sendmail issues type conversation...
>
> dan.
> --
>
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> Ph (+61 2) 9810 5177 - Fx (+61 2) 9810 0199
> http://www.nitro.com.au/
>
>
>
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