Embedding an image in an email using linux commands

Question

Is there a way to embed images into the body of an email using linux commands like mutt or sendmail?

I used this

mutt -e \         


        

Answer 1

Here is an improved version of the Joce's script.

This one does not require a custom sendmail command, because it creates one on the fly, uses it and deletes it afterwards.

It is parametric, so you don't need to change its code for different recipients and the like, and it offers a few other goodies.

The first few lines of code should be clear enough to explain the five positional parameters meaning, but here is an example, just in case:

 /srv/emailbody.html "Sender's Name" sender@example.com "Embedded images" 'Recipent's name ' 

It depends on mktemp (the original script did not), because I like that more than using $$, but that's only a matter of taste.

#!/bin/bash

HTMLFULLPATH="$1"
SENDER="$2"
SENDEREMAIL="$3"
SUBJECT="$4"
RECIPIENT="$5"

HTML=$(basename "${HTMLFULLPATH}")
SENDERDOMAIN=$(echo "${SENDEREMAIL}" | cut -d@ -f2)

if ! [[ "${RECIPIENT}" == '*<*' ]] ; then
  RECIPIENT="${RECIPIENT}"'<'"${RECIPIENT}"'>' # TO_NO_BRKTS_* SpamAssassin rules
fi

function atexit
{
  rm -rf "${TEMPDIR}" "${NEOMUTTCONFIG}" >/dev/null 2>&1
}

trap atexit INT TERM EXIT

TEMPDIR=$(mktemp -d)
mkdir -p "${TEMPDIR}/img"
grep "src=" "${HTMLFULLPATH}" | sed -e "s,.*src=\"\([^\"]*/\)*\([^\"/]*\)\".*,wget \1\2 -O ${TEMPDIR}/img/\2," > "${TEMPDIR}/getimg.sh"
bash "${TEMPDIR}/getimg.sh" >/dev/null 2>&1
sed -e 's,src="\([^"]*/\)*\([^"/]*\)",src="cid:\2@'${SENDERDOMAIN}'",g' < "${HTMLFULLPATH}" > "${TEMPDIR}/${HTML}"
SENDMAIL="${TEMPDIR}/sendmail.sh"

cat > "${SENDMAIL}" << EOF
#!/bin/bash
sed -e 's,Content-Disposition: attachment; filename="\([^"]*\)",Content-Disposition: inline; name="\1"\nContent-ID: <\1@'${SENDERDOMAIN}'>,' < /dev/stdin | sed -e 's,Content-Type: multipart/mixed;,Content-Type: multipart/related;,' | sendmail \$*
EOF

chmod a+rx "${SENDMAIL}"

NEOMUTTCONFIG=$(mktemp)

echo 'set from="'"${SENDER}"' <'"${SENDEREMAIL}"'>"' >> "${NEOMUTTCONFIG}"
echo 'set smtp_url=""' >> "${NEOMUTTCONFIG}"
echo 'set sendmail="'${SENDMAIL}'"' >> "${NEOMUTTCONFIG}"
echo "set content_type=text/html" >> "${NEOMUTTCONFIG}"

neomutt -F "${NEOMUTTCONFIG}" "${RECIPIENT}" -s "${SUBJECT}" -a "${TEMPDIR}/img/"* < "${TEMPDIR}/${HTML}"