Delivery Status Notification (Failure)

From
Mail Delivery Subsystem <mailer-daemon@googlemail.com>
To
tt@thekey.com
Date
Fri, 22 Nov 2024 10
Folder
INBOX
📎 icon.png
** Address not found **

Your message wasn't delivered to ap-invoices@thekey.com because the address couldn't be found, or is unable to receive mail.

Learn more here: https://support.google.com/mail/?p=NoSuchUser

The response was:

550 5.1.1 The email account that you tried to reach does not exist. Please try double-checking the recipient's email address for typos or unnecessary spaces. For more information, go to https://support.google.com/mail/?p=NoSuchUser a640c23a62f3a-aa50b58e803sor67306666b.16 - gsmtp