E-Mail mit Sendmail versenden im bash

#!/bin/bash

boundary="esrf3002j34534534q"
from="absender@foo.com"
to="empfaenger@example.org"

subject="Irgendein Betreff"
body="Der Inhalt dieser E-Mail"
declare -a anhaenge
attachments=( "datei1.tiff" "datei2.tiff" )


{

printf '%s\n' "From: $from
To: $to
Subject: $subject
Mime-Version: 1.0
Content-Type: multipart/mixed; boundary=\"$boundary\"

--${boundary}
Content-Type: text/plain; charset=\"UTF-8\"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

$body
"
 
for file in "${attachments[@]}"; do

  [ ! -f "$file" ] && echo "Warning: attachment $file not found, skipping" >&2 && continue

  mimetype=$(get_mimetype "$file") 
 
  printf '%s\n' "--${boundary}
Content-Type: $mimetype
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename=\"$file\"
"
 
  base64 "$file"
  echo
done
 
printf '%s\n' "--${boundary}--"
 
} | sendmail -t -oi