Subject box.
This is the box where you enter a brief sentence
as to what the e-mail is about. When the person receives
your e-mail, what is in the subject box will appear as the
message title. One note of caution here. Be sure to word
your subject carefully. Subjects like "Yo check this out,"
may be confused with "spam" (junk e-mail) and may get
deleted without being read.