Dear …
I am sending this note to advise you of a change to my email address. Effective __(immediately/date)__, my new email address __(is/will be)__: __(new email address)__.
Kindly delete the old one from your records and replace it with this new one. Thank you.
It has been my privilege to be your __(type of service provider)__, __(Name)__. Taking care of my client’s needs is a high priority for me and I ask you to feel free to contact me anytime by phone or at the new email address mentioned above, for assistance with your __(type of)__ needs. As one of my valued clients, you are such a pleasure to deal with and I genuinely look forward to being of service to you again.
Take care and best wishes.
Sincerely,