Jude's Blog

POP Connectivity Fails for Outlook Users on Exchange Server

with one comment

Issue: So basically the scenario was, due to a power failure all the servers were restarted. Once they were all back, things were running smoothly until we noticed that there were connection problems with POP users.

Here are the symptoms;

  • Outlook users who are connecting through POP is able to connect, but unable to send or receive mails.
  • Microsoft Exchange POP3 Backend service is in the Running state.




  • On the Microsoft Connectivity Analyzer page, the POP connectivity test fails with the following error.

The POP service is being tested.
There was an error testing the POP service.
Additional Details
at Microsoft.Exchange.Tools.ExRca.Tests.ImapPop.Pop3ProtocolTester.SendCommand(String command,StringlogString)
at Microsoft.Exchange.Tools.ExRca.Tests.ImapPop.MailProtocolTester.SecureConnection()
at Microsoft.Exchange.Tools.ExRca.Tests.lmappop.BaseProtocolTest.PerformTestReally()

Elapsed Time: 125 ms.







So basically, something clearly wasn’t right on the Exchange Server. If you are getting the above error here’s the fix.

  1. Log on to the Exchange Server
  2. Open Exchange PowerShell
  3. Run the following command

    Get-ServerComponentState -Identity <ServerName>


  4. Note the PopProxy component state is “Inactive”


  5. On the Exchange PowerShell module, run the following command to activate the PopProxy component.

    Set-ServerComponentState -Identity <ServerName> -Component PopProxy -State Active -Requester HealthAPI


  6. Run the Get-ServerComponentState command again to verify that the service state is up.


  7. To verify POP service is working for users, go to the Microsoft Connectivity Analyzer and perform a POP test. The connection should be successful.


Written by judeperera

April 22, 2016 at 6:12 am

One Response

Subscribe to comments with RSS.

  1. Thanks!


    May 29, 2017 at 12:07 pm

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: