How should you schedule an email to send in Mail on iPhone?

 This is the correct way to schedule an email in the Mail app on iPhone, as introduced in iOS 16. You can compose your email as usual, and then long-press the send button (an upward arrow) to see the options for scheduling. You can choose from the suggested times, or tap “Send Later” to set a custom date and time. The scheduled email will appear in a separate mailbox called “Send Later”, where you can view or delete it. The email will be sent automatically at the scheduled time, as long as your iPhone is on.  References :  How to Schedule Emails on Your iPhone - How-To Geek ,  Schedule an Email in Apple Mail on Your iPhone (iOS 16) ,  How to schedule emails on iPhone, iPad, and Mac to send later ,  How to Schedule Email in the Mail App on iPhone - Guiding Tech ,  How to Schedule Emails on an iPhone - groovyPost