Modern versions of Mail don’t include this option, and Gmail handlesemailsmore efficiently.
You’re most likely using a modern version, but if not, these instructions might apply to you.
Open theSettingsapp from the iPhone Home screen.
Go toMail>Accounts.
Choose your Gmail account.
In theIncoming Mail Serversection, tapUsername.
For example, if the username is recent:example@gmail.com, make it example@gmail.com.
With these situations, the fix is to examine your Gmail filters and other parameters and edit as needed.
The Gmail recent mode sends all connecting email programs or mobile devices the last 30 days of Gmail messages.