How to send an email from bash via SMTP Auth

bash-smtp-auth-email

$!/bin/sh
# Send an email from bash with SMTP This is an attempt to create a pseudo class to have an email routine/template to use 
# in scripts that send emails.  I'm using FreeBSD so the original gist had been modified to make it work there.

RECIPIENT=""
SENDERNAME=""
SENDEREMAIL=""
SMTPUSERNAME=""
SMTPPASSWD=""
SMTPSERVER=""
SUBJECT=""
BODY=`cat <<'EOF'
Insert Body Here
EOF`

# Use quotes around "$BODY" to preserve newlines

# This seems to be working on FreeBSD
$SENDMAIL=`echo "$BODY" | mailx  -s $SUBJECT $RECIPIENT -f "From: $SENDERNAME <$SENDEREMAIL>"
$SENDMAIL

# not working on FreeBSD -S not found so might make a switch to mutt
#SENDEMAIL=`echo "$BODY" | mailx -s $SUBJECT -S smtp=smtp://$SMTPSERVER -S smtp-auth=login -S smtp-auth-user=$SMTPUSERNAME -S smtp-auth-password=$SMTPPASSWD -S from="$SENDERNAME <$SENDEREMAIL>" $RECIPIENT)`
$SENDEMAIL