How to Mark iPhone Emails as Read
New emails that haven’t been read have blue dots next to them in the Mail Inbox. The number of these unread messages displays on the Mail app icon. Whenever an email is opened in the Mail app, iOS marks it as read. The blue dot disappears, and the number on the Mail app icon declines. To remove the blue dot without opening the email:
How to Mark Multiple iPhone Emails as Read
To mark multiple messages as read:
Mark Emails as Read With IMAP
Sometimes an email system marks messages as read without you doing anything on your iPhone. If any of your email accounts use the IMAP protocol (Gmail uses IMAP), any message you read or mark as read in a desktop or web-based email program also appears as read on the iPhone. IMAP syncs messages and message status across all devices that use those accounts.
How to Mark iPhone Emails as Unread
You may read an email and then decide you want to mark it as unread to remind yourself that you need to come back to it later.
How to Flag Emails on iPhone
The Mail app also flags messages by adding an orange dot next to the email. Flag emails to remind yourself that a message is important or that you need to take action on it. Flagging (or unflagging) messages is very similar to marking messages. You can flag multiple messages at once using the same steps as described in the last few sections. You can also flag an email by swiping right to left and tapping the Flag button. To see a list of flagged emails, tap the Mailboxes button in the upper-left corner to move back to your list of email inboxes. Then tap Flagged.
