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Outside emails take a long time to receive

We have SBS 2008 with Exchange Server 2007.  Outgoing emails to outside the organization recipients are being sent and received without a problems.  Incoming emails from outside the organization are not.  The receiver eventually receives them but hours after it was sent.  I ran Microsoft Remote Connectivity test for incoming emails from an outside source and found that when the Windows Firewall, it failed the test pointing to a firewall issue.  I turned off the Windows Firewall and got connectivity.  When I try to email from another outside email, it sends but the intended receiver still doesn't get the email until several hours after it is sent.  I thinking it is something internal that is causing the problem but not sure what it is.  Any insight would be helpful.
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Tlingit
Asked:
Tlingit
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1 Solution
 
Cris HannaCommented:
How many network cards in the SBS 2008 server
Can you post the ipconfig /all from the server?
Have you installed the Best Practice Advisor for SBS 2008?
Have you run the "Fix My Network" wizard?
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TlingitAuthor Commented:
I ran Fix My Network wizard.  It was unable to fix my router.  I made sure all possible ports that it suggested were open, ie, 80, 443, 987, and of course 25.  What would be causing this issue.
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Cris HannaCommented:
Very few routers are truly plug and play which is what is required for the wizard to be able to configure your router...this is very common

Actually Port 80 should be closed...not required
Would still like to have answers to other questions
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TlingitAuthor Commented:
Very few routers are truly plug and play which is what is required for the wizard to be able to configure your router...this is very common

Yes, I understand.  I thought this would be the reason why it's not configuring the router.

It is also saying it is missing the cname in DNS.  I know I need to put this the forward lookup section, under the *.local folder, but what name should I put to it?
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Cris HannaCommented:
What cname does it say it's missing?
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TlingitAuthor Commented:
It doesn't say what cname it is?  It just says it is missing.
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TlingitAuthor Commented:
It was the Barracuda Firewall and Spam Filter that was causing the delays in emails.  I pointed all incoming emails directly to the Exchange server bypassing the Barracuda.  Now the emails are coming through fast.
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Cris HannaCommented:
Wow...so did you remove the Barracuda unit from the networks?
What's acting as your firewall now?
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TlingitAuthor Commented:
We have Eset and using their firewall.
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Cris HannaCommented:
I realize the question is closed but I would suggest putting the Barracuda device back in place, if only just for the firewall.   It's going to be far superior protection to the software firewall in ESET.   Then contact Barracuda about the long delay on Email delivery
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