usendmail has been successfully installed! Now you have to change your sendmail(8) wrapping: If you are using mailwrapper(8), do the following: in /etc/mail/mailer.conf replace the lines sendmail /var/qmail/bin/sendmail send-mail /var/qmail/bin/sendmail with sendmail /usr/local/sbin/usendmail send-mail /usr/local/sbin/usendmail Otherwise replace the link from /usr/sbin/sendmail to /var/qmail/bin/sendmail with one to /usr/local/sbin/usendmail.