I don't understand the difference between the beginning of the letter followed by a comma or colon as follows:
Dear Sir or Madam, or To whom it may concern,
Dear Sir or Madam: or To whom it may concern:
My questions are:
1. Is a colon more polite and professional than a comma?
2. Is a comma used in the British letter, whereas is a colon used in the
American letter?
3. Is "Dear Sir or Madam" British English, while is "To whom it may concern" American English?
Your answer would be greatly appreciated.
Dear Sir or Madam, or To whom it may concern,
Dear Sir or Madam: or To whom it may concern:
My questions are:
1. Is a colon more polite and professional than a comma?
2. Is a comma used in the British letter, whereas is a colon used in the
American letter?
3. Is "Dear Sir or Madam" British English, while is "To whom it may concern" American English?
Your answer would be greatly appreciated.