I track emails with the Hubspot plugin for Outlook. Recently - As in the past week or so - when I send an email, I receive an immediate ‘email opened’ notification.
This is not opened by the recipient - I did a quick test and sent a mail to my personal email and got that notification before I even had a chance to swithc to my email client.
Why would this suddenly start happening?
I saw simialr issues on posts from 2022.