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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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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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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 .<br />
<a href="https://filedb.experts-exchange.com/incoming/2018/02_w07/1275458/2018-02-17_193201.jpg" target="_blank" class="file-inline" title="quee (84 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>2018-02-17_193201.jpg</a>
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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 .
2018-02-17_193201.jpg [https://filedb.experts-exchange.com/incoming/2018/02_w07/1275458/2018-02-17_193201.jpg]

2018-02-17_193201.jpg

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also check if your IP is not blacklisted and check the IOps of the disks
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also check if your IP is not blacklisted and check the IOps of the disks

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Dear<br />
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 .
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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 .

Problem in Exchange 2007

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

The Microsoft Server topic includes all of the legacy versions of the operating system, including the Windows NT 3.1, NT 3.5, NT 4.0 and Windows 2000 and Windows Home Server versions.