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Subject: Re: qmail, from bugtraq
From: Dave Sill (ds-list-postfixsws5.ctd.ornl.gov)
Date: Mon Feb 07 2000 - 07:51:00 CST

Irwan Hadi <irwanhadiiname.com> wrote:

>At 23:56 06/02/2000 +0100, Rask Ingemann Lambertsen wrote:
>> Really? Watch what happens with the bounce message. Qmail immediately
>>tries to deliver it. Oh rats, we're (still) out of memory, so this one
>>bounces too. We now have a double bounce which qmail tries to send to the
>>address configured for double bounce delivery. With the system still out of
>>memory, the double bounce also bounces, at which point qmail gives up on it
>>and calls unlink(). The message has now been lost.
>>
>Yes, it;s true. I have the same experience with that.
>A few days ago, I sent a letter to someone. Her mail server is using qmail
>as the MTA. Did you know what happens next ? as written above. The error
>messages were generated more than 10 times to my address, but I only sent
>to her _one_ letter.

What you're talking about is not the result of insufficient memory.
I've seen similar behavior with misconfigured .qmail files,
though. (.qmail files are qmail's equivalent of .forward). Without
knowing more details, it's not possible to more than speculate,
though.

>First I thought that the mailserver at her place did looping, but actually
>qmail automatically add deliver-to: on the header to prevent such looping.
>So the only possibility this could be happened is as your email.

No, there are lots of other possibilities.

-Dave