Send an email on every ssh login with mail command

#!/bin/sh
if [ "$PAM_TYPE" != "open_session" ]
then
  exit 0
else
  {
    echo "User: $PAM_USER"
    echo "Remote Host: $PAM_RHOST"
    echo "Service: $PAM_SERVICE"
    echo "TTY: $PAM_TTY"
    echo "Date: `date`"
  } | mail -s "$PAM_SERVICE login on `hostname -s` for account $PAM_USER" root
fi
exit 0

#please add
#session optional pam_exec.so /root/send-mail-on-ssh-login.sh
#to /etc/pam.d/sshd
#your email could probably get marked as spam
#if your mail is not sent, you probably need to run sendmailconfig