Exchange 2007 not receiving emails

Our exchange 2007 server is not receiving emails from outside our network. Inner Network emails are going through fine and Emails going to the outside are going through. But any email comming into the network isnt being received.

The server is connected to the internet and can ping any site from the cmd prompt.

Also the server is talking with our blackberry server and sending the inner network emails to the blackberry server then to the devices.

Any ideas or suggestions
arthurpressAsked:
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SembeeConnect With a Mentor Commented:
Whether anything has changed or not doesn't really matter.
You need to telnet to the port to confirm if it is still open and able to receive email. That needs to be done from both inside and outside of the network. If it works in one but not the other then the problem is most likely not Exchange. If it doesn't work inside then you have to look to see why SMTP has failed.

Simon.
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mcse2007Commented:
First thing that I will check is your firewall rules ? What type of firewall you have in placed ? ISA ?
is the SMTP port 25 open from your ISP side ?  You must have a firewall rules like SMTP server (allow) bound to External (Internet)
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arthurpressAuthor Commented:
Our server has been working fine for about 3 months since we first started it up and got it running. Firewall setting havent changed. Neither has the exchange email settings
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mcse2007Commented:
check if the MX record in your DNS still existed from your DNS server from LAN ?what  about your DNS mx record from your DNS hosting provider - an changes on this as well ?
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arthurpressAuthor Commented:
no changes both have stayed the same
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mcse2007Commented:
There is something has definitely changed either in your LAN or public network otherwise you wouldn't be experiencing this problem. Double check your settings from those comments I posted above.
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arthurpressAuthor Commented:
Problem was exchange's C drive wasnt big enough and our spam filter was unable to forward the emails to us. Thank you all for your help on the problem
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arthurpressAuthor Commented:
He was right about it not being exchange but being something else related to exchange
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mcse2007Commented:
hey arthurpress,

As I said  "there is something has definitely changed in your LAN" that includes your server !

You could have at least a bit more generous on your point allocation.

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