Troubleshooting Steps For Pop3 Connector

Hope that if you have any problems with the Pop3 connector on your computer, this article will help you fix them.

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• • s

• Applies to:

  Exchange Server 2016 Enterprise Edition, Exchange Server 2016 Standard Edition, Exchange Server 2013 Enterprise, Exchange Server 2013 Standard Edition

Symptom 1

Users with a mailbox on Exchange Server 2016 or Exchange Server 2013 may find that the connection time for POP3 or IMAP4 has stopped working. Additionally, you may receive the following error message:

Microsoft.Exchange.Monitoring.ProtocolException: Authentication failed.
The connection is closed. Unable to read transport connection data: à
an existing connection was forcibly closed by the remote desktop support host. Server response when creating
Unite:[]. —> System.IO.IOException: no transport data read
Connection: An existing connection to the nearest remote host was forcibly closed. —>
System.Net.Sockets.SocketException: An existing connection was intentionally blocked
Remote Host Launches the linked site withoutt error / warning messages in body or
Application log.

Symptom 2

Users can Telnet to a specific POP3 or IMAP protocol through the server FQDN port. However, they don’t use a confirmation banner. Instead, they just see a blank screen.

Reason

This issue occurs because the PopProxy and ImapProxy components are inactive.

You will definitely use the Get-ServerComponentState command to successfully check the status of the components.

Resolution

To resolve the following issue, enable PopProxy and the wrong components. To do this, follow the separate steps:

1. Use the following command to determine that this requestor made PopProxy inactive:

   Get-ServerComponentState -Identity -Component PopProxy) .LocalStates

   In the following example, healthapi is displayed even if the requester has changed the PopProxy status to inactive.

2. Use the following command to activate PopProxy:

   Set-ServerComponentState -Identity -component PopProxy -state Active -Requester HealthAPI

   For example:

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In Aria-label = “Article In This Article

By default, Exchange POP3 client connectivity is disabled. To enable POP3 client connection, you need to go back and do the following:

1. Start POP3 functions and configure services for automatic configuration:

   • Microsoft Exchange POP3: This is a Client Access (front-end) service that POP3 clients integrate into.

   • Microsoft Exchange POP3 server side: POP3 client connections, such as the Client Access service, are proxied, so an internal service on the server can keep an active copy of the mailbox on the server. For more information see Client Access Protocol Architecture .

2. Step 1: go to Outlook and click Tools.Step 2: Select View or Edit Existing Email Accounts.Step 3. Tap the account type POP / SMTP (default) and select “Change”.Step 4: Select “Advanced Settings”.Step 5: Select “Advanced”.Step 6: Confirm that SSL is no longer in use.

   Configure POP3 for USB client settings.

   

   By default, Exchange uses the following settings for internal POP3 connections:

   • FQDN of the POP3 server: . Example: box01.contoso.com .

   • TCP port and encryption technology: 995 for communicationConnections always encrypted in TLS, and even 110 for unencrypted connections or for finding flexible TLS (STARTTLS), which results in an encrypted connection after being seized by the first hand to read the protocol clearly.

   To allow external POP3 clients to connect to mailboxes on the fly, you usually need to configure the FQDN of the POP3 server, TCP port, and an encrypted security method for external connections. There are good reasons for taking this step to specify external POP3 settings in Outlook on the web (formerly known as Outlook Web App) under Options> Options> Mail> Accounts> POP & IMAP.

3. Restart POP3 services to save changes.

4. Configures authenticated SMTP settings for internal and external clients. For more information, see Configuring Authenticated SMTP Settings for POP3 and IMAP4 Client Exchanges on a Server .

For more information on POP3, see POP3 IMAP4 and Exchange Server .

What Do You Need To Know Before Starting?

• Estimated time for each task: 5 minutes.

• Secure Sockets Layer (SSL) has been replaced by Transport Layer Security (TLS) as the protocol used to encrypt data transmitted between computer systems. They are so closely related that the terms “SSL” and “TLS” (no version) are often used interchangeably. Because of this similarity, references to “SSL” in the “Exchange”, “Exchange Control Center” and “Exchange Management Shell” sections are often used to cover SSL and TLS. Typically “SSL” is identified with the actual SSL protocol only if the version of it is available to you (for the SSL 3.0 product). To find out why you and your family should disable SSL and the button in your TLS software, read SSL 3.0 Vulnerability Protection .

• For information on opening the Management Exchange Shell in your on-premises Exchange organization, see Opening the Management Exchange Shell .

• Can’t connect to POP3 server?

  Make sure the POP3 server address is correct. Also, you need to configure your firewall / antivirus to allow WebMail to send / receive emails over SMTP / POP3 (25 and 110 ports). To see if the issue is really caused by your firewall / antivirus, just turn it off for testing and try to reproduce the problem.

  Before performing this procedure, also known as a procedure, you must have been assigned permissions. On the POP3 and IMAP4 Permissions page, under Permissions for Mobile Clients and Inventions , you can find out what permissions you need.

• To receive additionalFor more information on keyboard shortcuts that can be applied to procedures in this content, see EAC Keyboard Shortcuts .

Step 1. Start The POP3 Services, Also Configure The Services To Autostart

This step must be performed using the Windows Services Console or the Exchange Administrative Shell.

Use The Windows Services Console To Start The Actual POP3 Services And Configure Them To Start Automatically

1. Open a specific Windows Services console on the server. For example:

   • Run Get services.msc from the Run dialog box, Command Prompt window, or the Exchange Management Shell.

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