Dr. Smith holds a Ph.D.
No, typically you would use either "Dr." before the name or include educational credentials after the name, not both. For example, you could use "Dr. John Smith" or "John Smith, PhD."
Dr. Smith holds a Ph.D.
The abbreviation is not gender specific. It is the same for both male and female. In other words, Dr. Mary Smith, or Dr. John Smith.
Yes, it is proper to use "Dr." as a title before your name if you have earned a doctoral degree, such as a Ph.D., MD, or Ed.D. Listing credentials, such as Ph.D. or M.D., after your name is also common practice in professional settings to indicate your expertise.
Dr. James McCune Smith
I have never seen Dr after a name. It may be MD, PhD, EdD, DDS, etc. depending on your field of study. Still, if the degree is a doctorate, the Dr would go before the name. Thus as an example, John Smith PhD, or Dr. John Smith.
Your signature block should include your full name followed by "D.Min." to denote your Doctor of Ministry degree. Below that, you can include your professional title or any additional credentials, if desired. For example, "Dr. John Smith, D.Min." with your position or organization underneath.
There is no general or standard salutation for an individual with a masters degree, like you would have with a doctorate degree. In other words, Dr. John Smith.
address dr and dr smith
Typically, the name comes first and then the degree abbreviation. For Example, John Smith Ph.D
Dr. and Mrs. Smith
Dear Dr. & Mrs. Smith