PREUN

/bin/sh

#only remove in case of erase (but not at upgrade)
if [ $1 -eq 0 ] ; then
	/usr/sbin/alternatives --remove mta /usr/sbin/sendmail.ssmtp
fi
exit 0

POSTIN

/bin/sh

/usr/sbin/alternatives  --install /usr/sbin/sendmail mta /usr/sbin/sendmail.ssmtp 30 \
	--slave /usr/bin/mailq mta-mailq /usr/bin/mailq.ssmtp \
	--slave /usr/bin/newaliases mta-newaliases /usr/bin/newaliases.ssmtp \
	--slave /usr/share/man/man1/mailq.1.gz mta-mailqman /usr/share/man/man1/mailq.ssmtp.1.gz \
	--slave /usr/share/man/man1/newaliases.1.gz mta-newaliasesman /usr/share/man/man1/newaliases.ssmtp.1.gz \
	--slave /usr/share/man/man8/sendmail.8.gz mta-sendmailman /usr/share/man/man8/ssmtp.8.gz

POSTUN

/bin/sh

if [ "$1" -ge "1" ]; then
	if [ "`readlink /etc/alternatives/mta`" == "/usr/sbin/sendmail.ssmtp" ]; then
		/usr/sbin/alternatives --set mta /usr/sbin/sendmail.ssmtp
	fi
fi