Dr. Smith and Mr. Smith separately..
The letter salutation is written as: Dear Doctor and Judge Smith. The envelope is written as: Doctor Adam Smith and the Honorable Eve Smith.
"Dr and Mrs Smith" is the correct salutation. (With Smith replaced with the correct surname)
Dr. and Mr. Smith.
Mrs Smith, unless she has specifically changed her surname back to her maiden name
Dr. and Mrs. Smith
The Honorable and Mrs. (first name with middle initial, if any) Smith
The Honorable Judge Smith and Mr. Smith for the envelope and Judge Smith and Mr Smith for the letter.
probabaly just a mrs. would suffise
Mrs, Mrs & Mrs
The proper salutation for a man who is a doctor is Dr. David Jones or you can say Mr. David Jones, M.D. either way is ok. If the Doctor is married: Dr. David Jones & Mrs. Jones.
is is correct to use Dr. Mrs. for a female doctor?
Dear Judge Smith: See http://www.factmonster.com/ipka/A0771340.html for more info.