Thanks for posting in our newsgroup.
From your description, I know that when email is sent, regardless of it is
from internal or external, it stays in the "message pending submission"
queue for about 6-8 minutes and then delivers as normal. If I am off-base,
please don't hesitate to let me know.
Please take the following steps to see if the problem can be resolved:
Step 1: Please make a Force Connection, will the issue still occur?
1. Open Exchange Server Manager.
2. Expand to Domain(Exchange)->Servers->Servername->Queues.
3. Right click Message pending submission and then select Force connection.
Step 2: Please restart Microsoft Exchange System Attendant, will the same
1. Run Services.msc under command prompt.
2. Select Microsoft Exchange System Attendant and then click Restart on the
Step 3: Make a clean boot. The problem can be caused by some third party
1. Click Start->Run...->type msconfig and press Enter.
2. Click Services tab and select Hide All Microsoft Services and Disable
All third party Services.
3. Click Startup tab and Disable All startup items.
4. Click OK and choose Restart.
5. After reboot, check whether the problem still occurs.
6. If there are no more problems, please use the above steps to enable
services and startup items one by one in order to figure out the root cause
of this issue.
Step 4: Since the problem began to occur after you install and then
uninstall ISA 2 two day ago, the problem may be caused by network and
Exchange configuration. Please rerun the CEICW wizard.
1. Run the CEICW and configure the network settings.
2. Go through firewall option.
3. In the Internet E-mail tab, please click to "Enable Internet E-mail".
4. In the Email Delivery method page, please choose the correct email
delivery method. If you need to forward internet email to your ISP
Smarthost, please input the Smarthost address correctly. If you use DNS to
route emails, please choose this option.
Note: If you choose to forward emails to the ISP's email server (smart
host), you need to type the FQDN of the ISP's email server. If your ISP
provides you the IP address of their email server, for example,
220.127.116.11, you should type the IP address as "[18.104.22.168]" (without the
quotation marks) on the connector's properties page.
5. In the E-mail Retrieval Method page, check the "Use the Microsoft
Connector for POP3 Mailboxes" check box, click Next.
6. In the E-mail Domain Name page, enter your registered e-mail Internet
domain name, (i.e. domain.com).
Note: Considering the current condition, please input the ISP POP3 email
domain name (i.e. ISPPOP3Domain.com).
7. In the POP3 Mailbox Accounts page, click Add and add the appropriate
POP3 mailbox accounts, then click Next.
Note: Please delete the POP3 email account in the Outlook client.
8. Input the correct information in the rest page and finish the wizard.
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