Certain types of email address throw an error. I've come across this with two separate emails now and they both throw and error. The latest is this email.
The last time I attempted to resolve this issue with a separate email I didn't get a resolution.
Hoang van canh commented
Adminjeffc (Admin, Adobe) commented
Thank you for your feedback. Can you please share more details on what the exact error is or a screenshot of the error? Also can you give a full list of the email types that are having the problem?