CentOS 8.x Control Web panel Disabling POP3 protocol

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How to Disable the POP3 Protocol in a CWP Mail Server

1. Open the Dovecot configuration file:

vim /etc/dovecot/dovecot.conf

2. Locate the following line and remove pop3 from the list of enabled protocols:

protocols = imap lmtp pop3 sieve

Update it to:

protocols = imap lmtp sieve

3. Restart the Dovecot service to apply the changes:

systemctl restart dovecot

4. Verify that the POP3 ports (110 and 995) are no longer listening:

netstat -tulnp | grep dovecot

or

ss -tuln | grep :110
ss -tuln | grep :995

5. Additionally, try configuring an email client with the POP3 protocol. If the configuration has been applied correctly, the connection will fail and you will not be able to use POP3.

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