This article provides step-by-step instructions for two ways to use the email reminders feature of the pre-installed Mail app. Instructions apply to iOS 16 and later.
Send Email Reminders on iPhone Using HTML Codes (Non-Automated)
If you receive a lot of emails, you probably have a system in place to make sure you don’t forget to respond to important messages (flagging is a classic). Even with your system in place, you may still miss a few. The email reminder feature can help you respond to every important email.
With email reminders, your iPhone can automatically remind you to respond to an important message at a date and time of your choosing.
There are two ways to set email reminders on iPhone: when you're viewing your inbox, and when you're viewing the email itself. Here's how to set email reminders when you're viewing your inbox: