You can adjust your preferences for the Mail app Privacy Protection, Ask Before Deleting, and Follow Up Suggestions.
Threading: Turn on Organize by Thread to group emails in a conversation together in your message list. Adjust other settings for how threads appear and muting threads.
Composing: Customize settings for writing emails such as including attachments with replies, showing link previews, and more.
Undo Send Delay: Set a time period of up to 30 seconds to allow yourself to on your iPad.
Tap Set email notifications on iPad