exchange 2019 smtp and pop access e-mail program

Hi,

Welcome to the Microsoft Q&A forum.

Did you refer to these links：https://video2.skills-academy.com/en-us/exchange/clients/pop3-and-imap4/configure-pop3?view=exchserver-2019&source=recommendations，https://video2.skills-academy.com/en-us/exchange/clients/pop3-and-imap4/configure-authenticated-smtp?view=exchserver-2019&source=recommendations

And based on my personal experience, the steps might be:

Enabling POP and IMAP Services:

1. Open the Exchange Admin Center (EAC):
   • Navigate to https://<YourExchangeServer>/ecp and log in with your admin credentials.

2.Enable POP and IMAP services:

• Go to Servers > Servers.
• Select the server you want to enable POP on and click Edit (the pencil icon).
• In the server properties window, go to POP3 and IMAP and enable the services. Make sure both services are started.
• Repeat the same for IMAP if you need it.

3. Configure Authentication Settings for POP and IMAP:
   • Go to Servers > Virtual directories.
   • Select POP3 (or IMAP4) and click Edit.
   • Under Authentication, choose the authentication method you prefer (e.g., Plain text login, SPA).
   • Ensure that the settings match the requirements for your clients.

Enabling SMTP Access:

1. Open Exchange Management Shell (EMS):
   • Run Get-ReceiveConnector to list all receive connectors.
2. Create a New Receive Connector for SMTP:

 New-ReceiveConnector -Name "External SMTP" -Usage Custom -Bindings 0.0.0.0:587 -RemoteIPRanges 0.0.0.0-255.255.255.255

3. Configure Authentication and Permissions:
   • Set permission groups for the new connector:

   Set-ReceiveConnector "External SMTP" -PermissionGroups AnonymousUsers,ExchangeUsers,ExchangeServers,Partners

• Enable basic authentication:

  Set-ReceiveConnector "External SMTP" -AuthMechanism BasicAuth

4. Restart Services:
   • To apply changes, restart the Microsoft Exchange POP3, Microsoft Exchange IMAP4, and Microsoft Exchange Transport services:

   Restart-Service MSExchangeTransport
   Restart-Service MSExchangePOP3
   Restart-Service MSExchangeIMAP4

Configuring User Settings:

1. Ensure the user has the appropriate mailbox settings:
   • In the EAC, go to Recipients > Mailboxes, select the mailbox, and click Edit.
   • Go to Mailbox features and ensure that POP3 and IMAP4 are enabled for the mailbox.

Client Configuration:

1. Outlook or other mail programs:
   • Use the following settings in the email client:
     • Incoming mail server (POP3): mail.yourdomain.com
     • Outgoing mail server (SMTP): mail.yourdomain.com
     • Authentication: Your username (usually the email address) and password.
     • Encryption: Choose SSL/TLS if your server requires it.
2. Port settings:
   • POP3: Typically port 995 (SSL) or 110 (non-SSL).
   • SMTP: Port 587 (TLS/STARTTLS) or 25.

Please feel free to contact me for any updates.And if this helps,don't forget to mark it as an answer.