I'm send emails to various officers in NROTC units and elsewhere and I feel uncomfortable since I don't know how to address them properly in my email correspondence.
Do I start with a:
Dear Sir, / Dear Ma'am,
Dear LT Jones, / Dear LCDR Jones / Dear CDR Jones,
LCDR Jones,
Lieutenant Commander Jones,
Dear Lieutenant Commander Jones,
Dear LCdr. Jones,
or something else?
Also, if someone is an LTJG, do I address him as LT or LTJG? Similarly, are LCDRs addressed as CDR?
This is pretty trite I know, but tell me once and I'll remember it.
Thanks!
Do I start with a:
Dear Sir, / Dear Ma'am,
Dear LT Jones, / Dear LCDR Jones / Dear CDR Jones,
LCDR Jones,
Lieutenant Commander Jones,
Dear Lieutenant Commander Jones,
Dear LCdr. Jones,
or something else?

Also, if someone is an LTJG, do I address him as LT or LTJG? Similarly, are LCDRs addressed as CDR?
This is pretty trite I know, but tell me once and I'll remember it.

Thanks!