--smtp-server::
If set, specifies the outgoing SMTP server to use. A full
pathname of a sendmail-like program can be specified instead;
- the program must support the `-i` option. Defaults to
- `/usr/sbin/sendmail` or `/usr/lib/sendmail` if such program is
- available, or to `localhost` otherwise.
+ the program must support the `-i` option. Default value can
+ be specified by the 'sendemail.smtpserver' configuration
+ option; the built-in default is `/usr/sbin/sendmail` or
+ `/usr/lib/sendmail` if such program is available, or
+ `localhost` otherwise.
--subject::
Specify the initial subject of the email thread.