Hah, that enterprise pricing is insane.
while echo -en "HTTP/1.1 200 OK\r\n..." | nc -l $IP $PORT; do
cat $MESSAGE | sendmail -i -t
done
More complex configurations could still be worked out in <50 lines of Python.Canaries on the other hand are exclusively used by technical people, who won't mind developing and spinning up a tiny honeypot.