ssmtp.conf still/again is world-readable by default. I was able to fix this by doing (as root):
chmod -R 2750 /etc/ssmtp/ chown root:mail /etc/ssmtp/ chmod g+s /usr/sbin/ssmtp chmod g+s /usr/sbin/sendmail chmod g+s /usr/sbin/mailq Though I might have added a +s more than strictly necessary. I also did dpkg-statoverride --add root mail 2750 /etc/ssmtp dpkg-statoverride --add root mail 2750 /etc/ssmtp/ssmtp.conf dpkg-statoverride --add root mail 2750 /etc/ssmtp/revaliases dpkg-statoverride --add root mail 2755 /usr/sbin/ssmtp dpkg-statoverride --add root mail 2755 /usr/sbin/sendmail dpkg-statoverride --add root mail 2755 /usr/sbin/mailq And now it all seems to be working fine. Sincerely, Thom Wiggers