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Syswatch6000Flag for Denmark

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Very slow Exchange 2007

Hi...
I have en SBS 2008 server with Exchange 2007. When people send us email it takes between 3-5 minutes before it apears in both Outlook 2010 (cachemode) and OWA.
Earlier the emails popped up immediately...

There is no anti spam on the server itselfs, but we have mailfiltering hosted.

The problem is there on both external and internal mails, so I dont think the problem is the mailfilter.

Exchange 2007 is latest version with all hotfixes installed.

I really dont know where to look... anyone that can help ?
What can I do to restore the performance on the exchange server ???
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Kash
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do you have any kind of firewall on your network which is filtering traffic ?
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We only have our WAN firewall CISCO ASA 5510, but it does not filtering traffic.
Hi, You mentioned that you have this issue in (cache mode) in outlook 2010 how about online mode ? is there a change in performance or still the same?
It's the same in OWA....
The ASA device does filter SMTP traffic. It is notorious for causing odd email delivery issues.
It is so common that Microsoft have a KB article on the process:

http://semb.ee/fixupsmtp

Simon.
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Syswatch6000
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I found the solution to my problem myself.