Overview
The error indicates that Send Email Action has failed to send an email. It can be preceded by additional error message that provides more detailed information on what has caused the failure.
Solution
If the error is caused by some email address which is no longer valid (e.g., server quota exceeded, temporary unavailable, etc.), try to identify the address which causes the failure and remove it from the list of recipients.
Still have a question?
If you have any questions, please do not hesitate to contact our support team.