mailq - show contents of the mail queue
This is a link to the ssmtp binary. It invokes /usr/sbin/sendmail
option. It is provided for compatibility with the sendmail
In this case it does absolutely nothing since sSMTP does not support mail queues
and is just there to avoid programs returning error messages.
This manual page was written by Matt Ryan <firstname.lastname@example.org> for the
Debian GNU/Linux system.