We found that some subscribers with strict security settings, such as those with .edu or .gov domains, may trigger automatic opens or clicks when receiving your emails.
This happens because certain spam filters preload links and images to verify their safety. You can confirm this by adding a hidden link to one of your email campaigns and checking if it gets clicked.
If a significant portion of your audience uses strict domains (like .edu, .gov, etc.), we suggest encouraging them to provide their personal email addresses when signing up. If you use online forms to collect subscribers, consider adding a note advising them to use their personal email instead of their business email.