We are currently experiencing the following error message:
The SMTP mail system returned the following error: (0x80064020E): The server rejected the sender address. The server response was: 530 5.7.1 client was not authenticated.
We are currently experiencing the following error message:
The SMTP mail system returned the following error: (0x80064020E): The server rejected the sender address. The server response was: 530 5.7.1 client was not authenticated.
It appears your SMTP server is configured to require an authenticated sender address. Use a valid address.
What is the type of authentication you have set in the SMTP Mail Setup ?