- Check the email queue to determine if there is a backlog
- Check for any errors present in the queue
- Check for any mail flow rules that may be blocking message delivery
- Look for any message throttling limits that may be preventing delivery
- Investigate the domain settings and ensure the correct DNS is configured
To check the email queue, open the Exchange Management Console, click the ‘Toolbox’ tab, and then select the ‘Queues’ option.
Note any errors found and investigate the cause.
To check for any mail flow rules, open the Exchange Management Console, click the ‘Toolbox’ tab, and then select the ‘Mail Flow Rules’ option.
To check for any message throttling limits, open the Exchange Management Console, click the ‘ms-Exch-Client-Throttling’ option, and then modify the ‘Receive Message Rate Limit’ value.
Ensure that the right MX records are pointing to the right servers.
