PREUN

/bin/sh

if [ "$1" = 0 ]; then
   /usr/sbin/alternatives --remove mta /usr/bin/esmtp-wrapper
fi

POSTIN

/bin/sh

# newaliases is fake, so don't install the links.
/usr/sbin/alternatives --install /usr/sbin/sendmail mta /usr/bin/esmtp-wrapper 30 \
  --slave /usr/lib/sendmail mta-sendmail /usr/bin/esmtp-wrapper \
  --slave /usr/share/man/man8/sendmail.8.gz mta-sendmailman /usr/share/man/man1/esmtp.1.gz \
  --slave /usr/bin/mailq mta-mailq /usr/bin/esmtp-wrapper \
  --slave /usr/share/man/man1/mailq.1.gz mta-mailqman /usr/share/man/man1/esmtp.1.gz

#  --slave /usr/bin/newaliases mta-newaliases /usr/bin/esmtp \
#  --slave /usr/share/man/man1/newaliases.1.gz mta-newaliasesman /usr/share/man/man1/esmtp.1.gz \