Fortunately, creating an email signature (unfortunately, you can only have one for all accounts) in iPhone Mail is easy.
Set Up Your iPhone Mail Signature
To create a signature automatically appended to all emails you send from iPhone Mail:
- Tap Settings on the iPhone Home screen.
- Go to Mail, Contacts, Calendars.
- Tap Signature.
- Enter your desired signature under Signature.
- iPhone Mail does not include the standard signature delimiter automatically. You can add it when composing your signature.
- Press the Home button.

