Undeliverable but Delivered, Opened and Clicked?

[Andy2019]

Below is a copy-and-pasted segment of one contact's "Engagement" with a recent email. As you can see, it was sent at 11:36, Opened at 11:36, Opened again at 11:37, Clicked on at 11:37, then "Bounced as undeliverable" at 11:38. How is this possible, having already been delivered, opened and clicked? Feb 22, 2023 11:38am • Bounced as undeliverable • Email • for "ADA FINAL SAVE THE DATE Nutrition Forum" 11:37am • Clicked • Email • a link in "ADA FINAL SAVE THE DATE Nutrition Forum" on desktop device 11:37am • Opened • Email • "ADA FINAL SAVE THE DATE Nutrition Forum" on desktop device 11:36am • Opened • Email • "ADA FINAL SAVE THE DATE Nutrition Forum" on desktop device 11:36am • Was sent • Email • "ADA FINAL SAVE THE DATE Nutrition Forum"

[William_A]

Hello @Andy2019 ,

It's entirely possible that the receiving system utilized a bot to open and click in the email to check for malware, before ultimately choosing to bounce the email back to our system. To be more sure however, I'd advise calling our general support so they can live troubleshoot and securely collect the contact's info for further investigation. Otherwise, you may want to consider speaking with the Delivery team directly to see if they'd have any insight on such an occurrence.