In step 201, the tag extractor 121 extracts all HTML tags from {TAIL ~ an e mail} in {HEAD ~ the plurality} of e mails 
In step 201 , the tag extractor 121 extracts all HTML tags from { TAIL ~ an e mail } in { HEAD ~ the plurality } of e mails
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH