I wonder if there are terminologies for different parts of an email.
Say an email goes like this:
title: Help needed
Dear Mr. XXX,
I have trouble. Could you help me? Thank you!
Best regards,
YYY
I thought we could call "Dear XXX" the title. But this will create ambiguity since the real title is "Help needed", nor should I call it the beginning, since the real beginning is "I have trouble".
Same for "Best regards", which I'd rather not call it "the end" since the true end is "Thank you!".
That are the formal terminologies for thoes two parts?