It seems only if your familiar, as 'dear' is a familiar term.
If you are addressing several men and women in a letter, then the salutation can be 'Dear Ladies and Gentlemen'. Another salutation can be 'Sirs and Madams'. These types of salutations can be used for men and women that are on a committee.
comma or colon Examples: Dear A n na, Dear Sirs:
Gentlemen
no
Dear Sirs:
Dear Sirs,
Dear Sirs and Madams, is the way one would head a semi formal letter. There are countless different ways to start a letter depending on who it is being sent to.
Dear Sirs and Madam:
Dear Mr. Smith and Mr. Jones or Dear Sirs as an example
The ideal way to address a committee would be "Dear members of the committee" or "Dear Sirs"
Begin with "Dear sirs".
It depends on the context. It could be 'Sirs', 'Gentlemen', 'Messieurs', 'Messrs', or even nothing at all. What is your context?