.. _sieve_and_smtp_submission:

=================================
 Sieve and SMTP submission
=================================

.. code-block:: none

  postmaster_address = postmaster@%d

Email address to use in the From: field for outgoing email rejections. The
``%d`` variable expands to the recipient domain.

See :ref:`authentication-domain_lost` details when this does not work.

.. code-block:: none

  submission_host = smtp-out.example.com:25

SMTP server which is used for sending email rejects, Sieve forwards, vacations,
etc.

Alternatively, ``sendmail_path`` setting can be used to send mails using the
sendmail binary.

.. code-block:: none

  protocol lmtp {
    mail_plugins = $mail_plugins sieve
  }