To request a read receipt for a single email, tap the 3-dot menu on the Compose screen and select Request Read Receipt.
To automatically request a read receipt for every email you send from an account, go to Settings | Account Settings | [select your account] and turn on Enable Read Receipt.
Keep in mind that read receipts only work with email services that support them, like Exchange servers. Some email clients may also require the recipient's consent before sending a read receipt back to BlueMail.
