How do you delete the email addresses that come automatically from past references when you are composing a new email . i have already deleted the email account from the contact, but still when i compose a new email and press alphabet A all the email accounts from A where i have sent email earlier appear. I need the solution urgnetly as lot of my clients have moved emails and by mistake i keep sending it to their old id's.

in the attached document, i want to delete the emails from A but they keep coming up

Pls help