Can't send large messages from one Exchange client, other works fine. Error -3253

R

Roger Cornelis

Hi,

When sending (some) large e-mails from a PowerBook running Entourage, it
gets stuck in the local Outbox. After a few minutes, I get a "Connection to
the server failed or was dropped, error -3253", and I keep getting this
error every ten minutes, i.e. every time Entourage resyncs with the Exchange
server. Small messages (usually) do get through in the meantime.

A PowerMac configured "similarly" does not have the problem when sending the
same message through the same Exchange server. (I'm actually testing by
forwarding an old message that has a PDF file attached to it.) The problem
occurs only on the PowerBook, and usually (but not always) with large files.
Active Directory is enabled on both machines.

Does anyone have a clue how to fix this?
 
R

Roger Cornelis

Well, to follow up on my own question, hoping that this is useful to someone
else:
I suddenly realised that the portable computer had a firewall installed,
whereas the G5 relied on a LAN firewall. After disabling the firewall,
Entourage started working the way it should.

Below is the answer from the firewall software producer. I was pleasantly
surprised with the speed of their answer, but I keep finding it very strange
that it is so difficult to find information about this problem on the
Internet. After all, it's not a small problem.

®©


From: Stephane Sudre

Sent: Monday, 8 August 2005 12:01
To: Roger Cornelis
Subject: Problem ID# 595: Microsoft Entourage 2004 and Exchange 2003 problem



Hello,



this is a known problem in Mac OS X 10.4. When a filtering application

is installed and you send a file attachement bigger than 48 KB in

Entourage, the attachment will get corrupted sometimes.



Apple is working on fixing this problem.
 
P

Paul Berkowitz

Thank you for letting us know. This might explain a lot of these questions
we've had, that no one understood. OS 10.4 imposes a 48 KB limit when
there's a firewall? Weird. I'm not familiar with firewalls. Is this the OS
firewall you have turned on in System Preferences/Sharing/Firewall, or is it
some 3rd-party network firewall that's been set up for you?

--
Paul Berkowitz
MVP MacOffice
Entourage FAQ Page: <http://www.entourage.mvps.org/faq/index.html>
AppleScripts for Entourage: <http://macscripter.net/scriptbuilders/>

Please "Reply To Newsgroup" to reply to this message. Emails will be
ignored.

PLEASE always state which version of Microsoft Office you are using -
**2004**, X or 2001. It's often impossible to answer your questions
otherwise.
 
R

Roger Cornelis

It's a third-party firewall, but their answer seems to imply that it occurs
with any firewall (or "filtering application").
 
L

lob4475

I had exactly the same problem on my alubook with entourage.
Googling high and low revealed nothing other that the problem wa
network-related in some way.

At some point i tried uninstalling little snitch - and this fixed th
problem immediatly. I suppose the problems started out at the samt tim
i originally installed Little Snitch, but since i dont email ou
attachments every day, i cant really say for sure.

You might also want to know that Little Snitch apparently cause
trouble even when not activated in its own preference pane. I gues
this is because it actually patches some network-libraries, but am no
sure.

Anyway, hopes this helps somebody.

-be
 
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