Read receipts work by adding a tiny image to the emails you send with them turned on. Newton shows you only who opened your email and when, never a recipient's location or IP address.
How it works
Read receipts are off until you turn them on, for every email or for one email at a time.
With Gmail and IMAP accounts, each recipient gets a copy with their own image, so Newton can tell who opened it. With Outlook accounts, everyone shares one image.
Newton doesn't send your recipients any notice or request.
When a recipient's mail app loads the image, Newton's server records the time, plus the IP address and app details that come with the request. Newton uses these to filter out bots, security scanners and your own opens. They aren't shown in the Newton apps.
Newton deletes open records after 180 days, and right away when you remove that email account from Newton or delete your Newton account.
Good to know
A recipient whose mail app blocks images isn't tracked, because the image never loads.
Reading your own sent email in Newton doesn't count as an open.
Newton also blocks tracking images in email you receive, unless you turn off Block tracking pixels.