Request a new official email address. Mr. Sir, I'm writing to you because I have a request. I'd want to suggest that the firm have a professional email address. (Explain in your own terms.) This would help us to keep our files up-to-date and also make it easier for people to reach us by email. Please send me a reply indicating that my suggestion has been accepted and then let me know what name will be used for the new email address. I look forward to hearing from you.