You need ssmtp in order to use it:
* mail-mta/ssmtp
Latest version available: 2.61-r2
Latest version installed: 2.61-r2
Size of downloaded files: 156 kB
Homepage: ftp://ftp.debian.org/debian/pool/main/s/ssmtp/
Description: Extremely simple MTA to get mail off the system to a Mailhub
License: GPL-2
#!/bin/bash
MAIL_ADDRESS=insert_here_your_mail_address
echo -e "Subject: Chkrootkit of: `date`\n" > /tmp/chkrootkit.mail
/usr/sbin/chkrootkit >> /tmp/chkrootkit.mail
SYSTEM_STATUS=`cat /tmp/chkrootkit.mail | grep INFECTED`
# Check if system was infected!!!
if [ "$SYSTEM_STATUS" ]; then
echo >> /tmp/chkrootkit.mail
echo "************************************" >> /tmp/chkrootkit.mail
echo "* YOUR SYSTEM WAS INFECTED *" >> /tmp/chkrootkit.mail
echo "************************************" >> /tmp/chkrootkit.mail
echo >> /tmp/chkrootkit.mail
fi
# Sending mail
cat /tmp/chkrootkit.mail | ssmtp $MAIL_ADDRESS
# Remove temp file
rm -f /tmp/chkrootkit.mail