A read receipt informs the sender that the recipient has seen the email. Proton Mail enables you to request read receipts from the recipient of your email. Once the request has been sent, the recipient has the option to accept or decline the request. If they choose to accept it, you will be alerted once your email has been read. If they choose to decline it, you will not receive a notification.
Note that read receipts are not automatically generated in Proton Mail and some email providers, including Gmail and Yahoo. In some cases, these email providers do not support generating receipts.
How to request read receipts
1. Select New message in the left sidebar to open the email composer.
2. Go to ⋯ (at bottom left of the composer window) → Request Read Receipt. Your recipient should now receive your request for a read receipt.
Note: If you save your email as a draft after selecting the read receipt option, you will need to reactivate it again before sending the email to your recipient.
How to send read receipts
You should see a banner at the top of your email informing you that the sender has requested a read receipt. You may choose to accept the read receipt or ignore it. If you ignore it, no read receipt will be sent.
1. If you want to accept the request, select Send receipt.
The sender will now receive a read receipt notification.