Dear Counselors:
Greetings!
Dear Counselors,
Mr and Mrs would be proper. Attorneys are typical written to as Mister.
To whom it may concern
Rabbi and Mrs.
The abbreviation becomes plural - Drs. Smith and Jones.
A proper salutation for greeting the president of a business is "Dear Mr. President". To conclude a letter, the proper word is "Sincerely" and a the name of the writer.
When greeting multiple women in person I would say "Hello ladies".
"Dear" is what people use it nowadays.
vmrs
Dear Mrs Ambassador..
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