Says Address not found but recipient clicked and opened emil
For some emails, Hubspot says address not found, but on then you can see that the person opened the email and clicked it. Are they actually getting the emails?
Welcome to the Community! If you can please confirm by going into the example of the contact record, and on the left side in the "about this contact" click in details in the "email" property.
details
After this please check if any changes on the contact email address could have happened after the email that had the action of (open and click) because that could be a possible way for the error to display. If the new email is invalid you will see this message.
If there was no changes, Are you able to please provide us an example of one of the contacts that have a message of "address not found"?
The more information, screenshots, and details you can provide, the better I can advise on the next steps.