If you're using a google account through your work, school, or other group, ask your administrator for help. You can add and edit your email addresses, like your alternate email address or contact email address. In your google account, open the personal info tab Under contact info, select email google account email If you can't open this setting, it might not be possible to change your email or username Learn more about changing your username
Follow the steps on the screen Change google account email other email addresses recovery email This help content & informationgeneral help center experiencesearch Edit or delete contacts after you add contacts to your android device, you can make changes or delete them Contacts saved to your google account will sync with google contacts and all your android devices. If you want to change your email address, sign up for a new address
Under general, scroll to signature and click the signature you want to edit You can also choose a signature default for new emails and emails that you reply to. How do i edit or remove email accounts suggested in chrome's autofill I need to remove redundant email accounts from popping up in chrome's autofill Change your gmail settings you can Add an email signature select which emails you're notified about change other settings
To address your concerns i would say that regrettably, gmail doesn't allow editing of sent emails Yet, you can potentially retrieve the email using the undo send feature within a brief window after sending.
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