The most appropriate gender-neutral letter salutation to use in a professional email is "Dear Recipient's Name."
The appropriate salutation depends on whether you also are a solicitor in your own country. If you are a female attorney too, then the appropriate salutation is "Chère Consoeur". However most French lawyers use the "Cher Confrère" salutation regardless of the gender of their interlocutor. If you are a man, you can write "Cher Confrère". If you are not an attorney, then the appropriate salutation always is 'Cher Maitre' or simply "Maître".
Yes, but most appropriate when it is job related.
A valid email is an address at which you can be contacted, one that works. Most people have more than one email address so you put the address that is the most appropriate for the use intended.
Your audience and purpose
The relationship between the salutation and complimentary close is that they should be equal in familiarity or formality, based on the writers relationship of the writer and the recipient.For example, the salutation "Hi Mom" wouldn't close with "Most Sincerely", or the salutation "Dear Mr. Collins" would not close with "Love Ya".
The most appropriate would be "Mazol Tov" which means congratulations in Hebrew. Also, I should point out that the term is Bar Mitzvah or Bat Mitzvah (Bar for a boy, bat for a girl).
Dear Mr:joseph, i hope you doing good.
Dear fool, prescribing a specific and normative correct or incorrect form of salutation to a letter is ridiculous. if your looking for the most proper or formal salutation your best bets are 'dear' (which is a bit personal and familiar and kinda sappy) or just simply (for maximum formality) 'Mr __________, ' and proceed with your letter.
* Face-to-face Greeting: Your Eminence * Envelope Address: His Eminence, John Cardinal Doe * Letter Salutation: Most Revererend Eminence or Most Eminent Cardinal* Face-to-face Greeting: Your Eminence * Envelope Address: His Eminence, John Cardinal Doe * Letter Salutation: Most Revererend Eminence or Most Eminent Cardinal* Face-to-face Greeting: Your Eminence * Envelope Address: His Eminence, John Cardinal Doe * Letter Salutation: Most Revererend Eminence or Most Eminent Cardinal* Face-to-face Greeting: Your Eminence * Envelope Address: His Eminence, John Cardinal Doe * Letter Salutation: Most Revererend Eminence or Most Eminent Cardinal* Face-to-face Greeting: Your Eminence * Envelope Address: His Eminence, John Cardinal Doe * Letter Salutation: Most Revererend Eminence or Most Eminent Cardinal* Face-to-face Greeting: Your Eminence * Envelope Address: His Eminence, John Cardinal Doe * Letter Salutation: Most Revererend Eminence or Most Eminent Cardinal