How is mixed punctuation defined in a letter?

Mixed punctuation in a letter is defined by having a colon following the salutation and a comma after the complimentary close. This style reflects a combination of formal and casual elements, which can contribute to a more personalized tone while maintaining a level of professionalism.

The use of a colon after the salutation signifies a formal greeting, appropriate for business communication. Meanwhile, placing a comma after the complimentary close softens the tone slightly, making it more approachable while still remaining respectful. This combination allows for flexibility in correspondence, making mixed punctuation a popular choice in various professional contexts.

Understanding this style is essential for effective written communication, as it conveys the right balance of professionalism and warmth that is often needed in business letters.