forming {HEAD ~ a fingerprint} of the e mail by linking together {TAIL ~ the extracted HTML tags} to form a single string 
forming { HEAD ~ a fingerprint } of the e mail by linking together { TAIL ~ the extracted HTML tags } to form a single string
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH