In one embodiment, the tag extractor 121 extracts {HEAD ~ all HTML tags} from {TAIL ~ the e mail} without including texts and tag attributes 
In one embodiment , the tag extractor 121 extracts { HEAD ~ all HTML tags } from { TAIL ~ the e mail } without including texts and tag attributes
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH