Edit File: pop3.xml
<?xml version="1.0" encoding="utf-8"?> <service> <short>POP-3</short> <description>The Post Office Protocol version 3 (POP3) is a protocol to retrieve email from a remote server over a TCP/IP connection. Enable this option, if you plan to provide a POP3 service (e.g. with dovecot).</description> <port protocol="tcp" port="110"/> </service>