How to delete a contact from your email account, go to the email account, open Contacts, and select the contact to be removed. Then, choose the Delete contact option to delete the contact. In some email services, the term People is used for contacts. In Thunderbird, open the Address book, choose the contact, and click Delete.
To change the email address, open the Email application.
Emails that you have deleted will be in the trash..
To archive the emails first, sign into the Gmail account.
First, log into the account and extend the side tab..