Unable to Send/Receive Internal External Email

Question

HI

Hopefully someone can help with this.

We have exchange server 2019 CU 15, when sending email through OWA it sits in drafts. If we use outlook, it goes to sent but is never sent through the exchange server. Both for internal or external recipients.

We are not receiving emails from outside domains as well.

Answer 1

Hi Craig Vazquez****, 

Thank you for posting your question in the Microsoft Q&A forum. To help us better understand and troubleshoot the issue, could you please confirm the following: 

1. Were you recently updated to Exchange Server 2019 CU15 or has it been in use for a while? If it was updated recently then did this issue start only after the CU15 update, or was it also present in earlier versions? 
2. Is the issue affecting all users across the organization, or only a specific subset? 

At this stage, the information provided is not sufficient to pinpoint the root cause. We recommend running message tracking to gather more insight into the affected emails. You can do this using either of the following methods: 

Option 1: PowerShell – Message Tracking 

You can use this feature of Exchange on-premise through Powershell by using Get-MessageTrackingLog: 

Get-MessageTrackingLog -Start "06/17/2025 00:00:00" -End "06/18/2025 23:59:59" -Sender "******@domain.com" 

You can filter by -Recipients, -EventId, or -MessageSubject as needed.  You can read more about this feature in this official documentation: Search message tracking logs | Microsoft Learn 

Option 2: Exchange Toolbox – Queue Viewer 

Use Queue Viewer to check if the messages are stuck in the submission or delivery queues. This feature can be access by Exchange Toolbox. 

For detailed guidance how to open it, please refer to Microsoft’s official documentation: View queued message properties in Queue Viewer | Microsoft Learn   

Let us know once you’ve gathered the logs or if you need help interpreting them. 

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Answer 2

Hi

I was able to resolve this by recreating the receive connectors.