title: Telent: connection to address 127.0.0.1: Connection refused
body: <p>I use Rocky Linux.
  When I do <code>telnet localhost 110</code>,
  terminal response is
  <code>Trying ::1...  telnet: connection to address ::1: Connection refused  Trying 127.0.0.1... telnet: connection to address 127.0.0.1: Connection refused  </code></p>
  <p>But port 110 is already open.</p>
  <p>How can I solve this problem?</p>