How to change your Twitter email address on a computer or mobile device

You can easily change your Twitter email to make sure your account is linked to the correct email account.

How to change your recovery email in Gmail using your computer

You should change your recovery email in Gmail if you made a new email or want to keep your account secure.
GIGAZINE

iOS 18.1 finally lets you change the email address associated with your Apple Account, with the option to set a 'primary email address'

We've learned that iOS 18.1 will add an option to easily change your Apple Account address and set it to your preferred address when sending emails. iOS 18.1 Includes Option to Set 'Primary' Email ...