Runs out of memory on mails with attachments larger then 5MB

[fraserat]

If I send an email larger then 5MB to my own account the server gives an error to the mail-client: Out of Memory! (Running vmstat I see a free amount of at least 150MB.)
Only an empty message with this header arrives:

From me@mydomain.com Sun Aug 26 14:55:26 2007
Return-Path: <me@mydomain.com>
Delivered-To: 2-me@mydomain.com
Received: (qmail 28172 invoked from network); 26 Aug 2007 16:55:26 +0200

Nothing to find in logs except this line:

spamc[3957]: skipped message, greater than max message size (256000 bytes)

It's unreproducible for me, why the messages are not delivered.

Has anyone experiences with this problem?
Thanks a lot.

fraser

_______________________
I have installed:
OS: Debian 3.1 with Plesk 8.2
MTA: psa-qmail
Other: Spamassassin 3.1.8, qsheff, procmail

 

[fraserat]

Qsheff seems to be the Problem. Any idea what to you instead?

 

[fraserat]

any idea?