title: PSQL port for Postfix
body: <p>I'm trying to configure postfix + dovecot + postgresql</p>
  <p>Since the mail server is located remotely, I raised the database on port 4081 nearby, since it is open</p>
  <p>Now I need postfix to listen not to port 5432 but to port 4081</p>
  <p>postfix/proxymap[23447]: warning: connect to pgsql server /var/run/postgresql: could not connect to server: Not a directory??Is the server running locally and accepting??connections on Unix domain socket &quot;/var/run/postgresql/.s.PGSQL.5432&quot;??</p>