Crossword Clue:

Brief letter

AnswerCrossword Clue
NOTEBrief letter
YOURSBrief letter-ending
BESTBrief letter closing
YOURSBrief letter ending
PSSBrief letter additions
SIRSBrief letter salutation
BESTBrief letter sign-off
YRSBrief letter sign-off