====== EXIM ======

=== configuration ===
Show reason of mail rejection. Without this, message body will be removed with note:
<code>X-Exim-DSN-Information: Due to administrative limits only headers are returned</code>
<file | /etc/exim4/conf.d/main/02_exim4-config_options>
smtp_return_error_details = true
</file>

Change sender address. To do not use default from /etc/mailname
<file | /etc/email-addresses>
root: root@myotherdomain.com
user: user@myotherdomain.com
</file>