service imap-login {
  inet_listener imap {
    port = 0
  }
  inet_listener imaps {
    port = 993
    ssl = yes
  }

[...]

service pop3-login {
  inet_listener pop3 {
    port = 0
  }
  inet_listener pop3s {
    port = 0
  }
}

#service submission-login {
  #inet_listener submission {
    #port = 0
  #}
  #inet_listener submissions {
    #port = 0
  #}
#}

service lmtp {
  unix_listener /var/spool/postfix/private/dovecot-lmtp {
    mode = 0600
    user = postfix
    group = postfix
  }
}

[...]

service auth {
  unix_listener auth-userdb {
    mode = 0600
    user = vmail
    group = vmail
  }

  # Postfix smtp-auth
  unix_listener /var/spool/postfix/private/auth {
    mode = 0666
    user = postfix
    group = postfix
  }

  # Auth process is run as this user.
  user = dovecot
}

service auth-worker {
  user = vmail
}