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Do you have free disks space?<br />
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do any event logs report errors?
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Do you have free disks space?

do any event logs report errors?

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Just a guess based on an odd recent 2003 problem. Rebuild the smtp send connector.
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Just a guess based on an odd recent 2003 problem. Rebuild the smtp send connector.

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did you restart the server after &nbsp;its was converted from hyperv to esx
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did you restart the server after  its was converted from hyperv to esx

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This happen to me just week ago. We have Exchange 2007 running on Hyper-V and attached with HP Left Hand Storage. The email queue was stuck until 7++++ mails. After checking on Exchange CAS/HTS and Mailbox server, there was no problem on these servers, nothing had been changed. The mail queue DB still have a lof free space. What we solve this problem is restart the HP Left Storage. Once restarting the storage, everthing work as normal.
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This happen to me just week ago. We have Exchange 2007 running on Hyper-V and attached with HP Left Hand Storage. The email queue was stuck until 7++++ mails. After checking on Exchange CAS/HTS and Mailbox server, there was no problem on these servers, nothing had been changed. The mail queue DB still have a lof free space. What we solve this problem is restart the HP Left Storage. Once restarting the storage, everthing work as normal.

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I have just converted a Hyper V &nbsp;Microsoft Exchange virtual machine to an ESXi virtual machine. The machine comes up , however when mails are sent by users they get stuck in the submission queue. All the relevant services have been started. Any Ideas
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I have just converted a Hyper V  Microsoft Exchange virtual machine to an ESXi virtual machine. The machine comes up , however when mails are sent by users they get stuck in the submission queue. All the relevant services have been started. Any Ideas

Microsoft Exchange

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

VMware, a software company founded in 1998,  was one of the first commercially successful companies to offer x86 virtualization. The storage company EMC purchased VMware in 1994. Dell Technologies acquired EMC in 2016. VMware’s parent company is now Dell Technologies.

VMware has many software products that run on desktops, Microsoft Windows, Linux, and macOS, which allows the virtualizing of the x86 architecture.  Its enterprise software hypervisor for servers, VMware vSphere Hypervisor (ESXi), is a bare-metal hypervisor that runs directly on the server hardware and does not require an additional underlying operating system.

VMware

Windows Server 2008 and Windows Server 2008 R2, based on the Microsoft Vista codebase, is the last 32-bit server operating system released by Microsoft. It has a number of versions, including including Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Storage; new features included server core installation and Hyper-V.