dovecot/rootfs/etc/confd/templates/10-master.conf.tmpl

service imap-login {
  inet_listener imap {
    port = 143
  }
}

service lmtp {
  inet_listener lmtp {
    port = 7777
  }
}

service imap {
}

service auth {
  inet_listener postfix {
    port = 6334
  }
}

service auth-worker {
}