This address belongs to MailBub

MailBub is an email app. Someone who uses it sent you an email with read tracking on, which adds a small, invisible image. When your mail app loads that image, MailBub tells them the email may have been opened, and when.

MailBub records the time, the browser or mail app details your app sent, the site it was loaded from but not the page, what kind of request it was, and your network, cut short so it can't single out your device. It doesn't record where you are. These details are kept for up to a week after the sender's copy of MailBub collects them, and never more than 30 days. After that, only when the email was opened, and with what kind of mail app, stays.

To stop it, turn off remote images in your mail app, or block this domain.

The privacy policy says more. To ask about it, email [email protected].