Exchange 2010 cannot recieve external mails, but internal and sending out is fine! Please help!!

Exchange 2010 cannot receive external mails, but internal and sending out is fine! Please help!!

I have rebooted the exchange server but the problem is still there. There is only 4gb of space on the drive out of 100gb. Is that ok ??

I have check the windows logs and cannot see anything there. Please advise.
gpersandAsked:
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gpersandAuthor Commented:
We have a mail proxy filter in place and I can see mails are being received by our network although after I release them from quarantine it like they are being stored by the exchange server and not being released.
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John GobertEnterprise Systems ConsultantCommented:
Can you share your email domain so I can run an SMTP test from MXToolbox?
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John GobertEnterprise Systems ConsultantCommented:
Are all of your incoming emails getting quarantined?
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Alan HardistyCo-OwnerCommented:
You sound like you are suffering from Backpresssure (low disk space / low memory).  Please have a read of my article for a quick fix to get your mail flowing again, then tackle the disk space if that is indeed the problem:

http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/A_4259-Exchange-2007-2010-Backpressure-Quick-Fix.html

Alan
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sirakovCommented:
With less than 4% of free space you might be hitting Back Pressure  on Ex2010
Back Pressure

When you hit Medium level than you have the following behavior :
Medium – a resource is moderately over-utilized and the server begins limiting some connection types. Typically internal email flow remains functional while email from external or non-Exchange sources will be rejected.

Simply try to to free some space and restart the transport service.
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Mohammed TahirMicrosoft Exchange and O365 AdministratorCommented:
If it will take long time to free disk space and you want to start the mailflow right now you can change the QueueDatabasePath and QueueDatabaseLoggingPath to another drive which has sufficient free disk space.

To chang the path go to navigate to \Program Files\Microsoft\Exchange Server\V14\Bin folder and open the file EdgeTransport.exe.config with notepad and change the same.You need to restart the MS Exchange Tranport service.

Refere:
http://www.msexchange.org/articles-tutorials/exchange-server-2010/management-administration/back-pressure-exchange-2010-part1.html

Tahir
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Md. MojahidCommented:
1.Check your MX records in your DNS and see where it's pointing to and then If that is good check your port forwarding.
2.Which authentication types are configured on the connectors ? Please ensure that one of them has anonymous for authentication. My personal advice is to create a seperate receive connector which has this settings.
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gpersandAuthor Commented:
Hey guys, firstly thanks for all of your responses. I have managed to resolve by clearing space on the server. I has a log file going out of control but have relocated it now.
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gpersandAuthor Commented:
I've requested that this question be closed as follows:

Accepted answer: 0 points for gpersand's comment #a39486194

for the following reason:

Overgrown log file
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Alan HardistyCo-OwnerCommented:
Overgrown log file is a cause of lack of disk space, which would result in BackPressure being applied, which several Experts have pointed to, my comment and link to my article was the first comment to mention this, with a solution.

Objecting to the intended closure accordingly.

Alan
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