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Mail not coming through my new proxy server

I currently have a hp proliant server running on windows server 2003 that acts as my proxy server. i recently aquired a new server that intend to use as my proxy server as the old one is now overwhelmed. I have windows server 2008 r2 running on in and microsoft threat management gateway. My problem is that ever since we switched over to the new server, any email that has attachments bigger than 20kb is not delivered to us. I've reverted back to the old server and normal email flow has resumed. What could be the cause of this?
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Petersennik
Asked:
Petersennik
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1 Solution
 
Rafik_GasmiCommented:
Hi,
i think you should have a look on this "  http://blogs.technet.com/b/sbs/archive/2008/10/28/how-do-i-change-message-size-limits-in-exchange-2007.aspx " it should resolve your issue


Cheers
R.G
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pwindellCommented:
You probably had Email Policy configured incorrectly on top of your Publishing.  
ISA2006 and older had no such features.
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pwindellCommented:
You cross posted this question in the Forefront Group,...So I assumed you new proxy is TMG2010 and that your old proxy was one of the ISA versions..

If not, then please do not post or cross post into groups that do not fit the situation.
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PetersennikAuthor Commented:
Sorry for taking so long to reply this. been a while since i was here. Let me look at rafik's solution and get back to you.
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PetersennikAuthor Commented:
Found out what the problem is. My firewal.
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PetersennikAuthor Commented:
None of the solutions provided helped solve the problem
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