Want to add some personality or useful contact details to your “Sent from my iPhone” email signature? You can delete the current signature and type a new one, perhaps including a website link, a Twitter account, or a company name. To do this, open the Settings app, then tap Mail and scroll down to Signature. From there, you can input a custom signature.

If you have multiple email accounts, you can change them individually by selecting the Per Account option.

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