Problem in Exchange 2007

Dear
I have critical case with exchange 2007 suddenly no mails not receiving and after i checked the queue service it gives me that they have about 8000 messages in submission, now i cant sending or receiving mails even entire my domain .
AlkannetworksAsked:
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Peter HutchisonSenior Network Systems SpecialistCommented:
Check the Excahange services on the servers, see this list to see what they do;
https://technet.microsoft.com/en-us/library/aa998342(v=exchg.80).aspx

Check if port 25 is open and available, run Netstat -a | grep "LISTEN". Also check using 'Telnet servername 25' to see if you get the SMTP banner showing.

Check that other programs or services such as Firewall, Antivirus or Antispam products have blocked the smtp port.
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systechadminConsultantCommented:
did you check the Event logs on the server? check drive space on the servers as wel.. can you send the full screen shot of the quue viewer.
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AlkannetworksAuthor Commented:
yes for drive space there is a bout 20 GB free in C and in exchange setup folder about 70 gb , for qeue view find attachment , and there is a huge mails sending to certain mail in my organization even i have reset , disabled account and disable all mail features like Owa , IMap and other features .
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systechadminConsultantCommented:
also check if your IP is not blacklisted and check the IOps of the disks
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AlkannetworksAuthor Commented:
thanks
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