I just came across two strange things:
a) When receiving messages from a Novell-Groupwise-System, sometimes one
'Received:'-line appears somewhere inside the body of the mail.
It looks like only mails coming from this system are affected, no other
mails have shown up with this behaviour. But I don't know how
to reproduce it. Size of the messages varies, sometimes short,
sometimes long with or without attachments.
The mail contains an additional 'Received: from KPMX-MTA by
mail.kieback-peter.de'. Nothing more, nothing less, exactly this
single string.
The problem appeared after upgrading from 3.34 to 3.953, messages
before that date were received OK.
b) The system logs lots of 'tcp_ack'-messages when receiving mails
from an external source. This message is coming from the tcp-stack,
but I'm not enough of a hacker to understand what is (or why)happening
there.
Example (wrapped long lines):
Feb 19 11:13:13 gate kernel: ^Mtcp_ack: seq a8c9e07c ack 5aafd932
Feb 19 11:13:13 gate kernel:
Data arrived on 053c8c0c after close
[Data right edge 5AAFD955, Socket shut on 5AAFD933] 0
Some notes about the hardware:
The system is a PII/266 with 160 MB RAM running Linux 2.0.39 with
libc5, external connection is a 256kBit-line with fixed IP. Compiler
is gcc 2.8.1, binutils 2.10.
Mails are scanned using amavisd-snapshot-20010714 and F-Secure for
Linux.
I moved back to the just released 3.35 version, and the kernel
messages immediately stopped. Let's see, if the strange corrupted
messages will also stop.
Maybe someone has experienced some similar behaviour (especially with
the tcp_ack) and can provide some helpful information?
--
mbs GmbH | http://www.mbs-software.de
Jochen Erwied | mailto:Jochen.Erwied@mbs-software.de
Roemerstr. 15 | phone: +49-2151-7294-0
47809 Krefeld | fax: +49-2151-7294-50
