I hope this letter finds you well. Thank you for your recent letter/ email. I appreciate you taking the time to write to me.
I’m writing to follow up on some of the points you raised in your previous letter/ email. Firstly, I wanted to address your concerns about…
I was pleased to receive your letter and I am happy to hear that you are doing well. I would like to take this opportunity to respond to some of the issues you mentioned in your letter.
Thank you for getting in touch. It is always a pleasure to hear from you. In response to your recent letter/ email, I would like to clarify…
I was delighted to receive your letter/ email and I’m glad to hear that you are doing fine. I would like to respond to some of the points you raised.
In regards to your letter/ email, I would like to express my gratitude for your kind words. It is always a pleasure to receive positive feedback.
Overall, I appreciate your correspondence and value your input. Thank you again for taking the time to write to me.