father_and_son
Well-known member
No, its just with letter writing, there have been rules laid down for centuries, eg start with "Dear Mr (name)", and therefore, sign off with "Yours sincerely,").
With email, it seems to be a free for all and the kids seem to be leading the way with their bollox speak.
Expanding a little... You can only be "sincere" if you name the person. It would be "Yours faithfully" if you don't name them in the salutation.