Turn on Notifications for Mail Threads
Mail notifications are not turned on by default. You can turn on notifications and specify the type of notifications for the threads in your inbox.
Open Settings on your iOS device and tap Notifications. In the Notifications screen, scroll down and select Mail. Turn on the Allow Notifications toggle switch and then select Thread Notifications. In the Thread Notifications screen, turn on the Allow Notifications toggle switch. Tap the circles under Lock Screen and Notification Center to see those alerts. Choose the circle under Banners for those notifications. Choose Sounds to play a sound when an alert comes through. Choose Badges to put a notification on the Mail icon when you receive a reply. You’ll receive alerts when you receive new emails in a thread according to the options you chose.
Set Alerts for Replies to a Specific Thread
If you don’t want notifications for all the threads in your Mail inbox, you can opt to have iOS Mail alert you about replies to a specific email thread:
Open an email in the thread or start a new reply to a thread. Tap the bell icon located to the right of the Subject field. If you don’t see it, tap the subject field to display the bell. Select Notify Me on the pop-up screen. When thread alerts are on, the bell icon appears filled in instead of as an outline. You’ll receive a notification when a message for the thread is received. Tap the solid-color bell icon to turn off notifications for the thread.
Setting Alerts for an Existing Thread in the Inbox
You can also turn on thread notifications for specific conversations directly from the Mail inbox.
Locate the email thread you want to receive alerts about in the inbox. Swipe left over the message. Tap the More option (gray box with three dots). Scroll to the bottom of the menu and tap Notify Me to turn on notifications for the thread. To turn off notifications, return to the thread, tap the arrow icon at the bottom of the screen and select Stop Notifying.
How Can I Find the Threads I Am Watching?
To spot conversations and emails that have alerts enabled in iOS Mail, look for the bell icon in the message list to the right of the subject line.