UNIX for Dummies Questions & Answers

Hello:

I've searched de forum but could not find an answer to send an email via sendmail in HTML with an text-file (plain-text) as attachment:

My code:

export FROM="Me"
export MAILTO="mymail"
export SUBJECT=$TITULO$bbdd
export BODY=$LOG
(
echo "FROM:$FROM"
echo "To: $MAILTO"
echo "Subject: $SUBJECT"
echo "MIME-Version: 1.0"
echo "Content-Type: text/html"
echo "Content-Disposition: inline"
cat $BODY
) | /usr/sbin/sendmail $MAILTO

How could I include the desired attachment?

Thank you very much in advance for your help and sorry if this question has been already posted.
Félix

Similar post : https://www.unix.com/aix/36448-comman...ttachment.html

Thanks Ygor but it doesn't work.
I tried out the following:
LOG=path/test_1.txt

export FROM="Me"
export MAILTO="adress@blablabla.com"
export SUBJECT="Test"
export BODY=$LOG
export ATTACH="path/test.txt"
(
echo "To: $MAILTO"
echo "Subject: $SUBJECT"
echo "MIME-Version: 1.0"
echo 'Content-Type: multipart/mixed; boundary="-q1w2e3r4t5"'
echo
echo '---q1w2e3r4t5'
echo "Content-Type: text/html"
echo "Content-Disposition: inline"
cat $BODY
echo '---q1w2e3r4t5'
echo 'Content-Type: application; name="'$(basename $ATTACH)'"'
echo "Content-Transfer-Encoding: base64"
echo 'Content-Disposition: attachment; filename="'$(basename $ATTACH)'"'
uuencode -m $ATTACH $(basename $ATTACH)
echo '---q1w2e3r4t5--'
) | /usr/sbin/sendmail $MAILTO

It doesn't attach the file but inlcudes it in the mail. It isn't necesary for me to include the file in binary. Any hint? Thank you.