I receive the following error when trying to send email from Manager
Mailbox unavailable. The server response was: Access denied - Invalid HELO name (See RFC2821 4.1.1.1)
I have previously had no issues with sending emails. I have also updated to the latest Linux version to see if the error was resolved which was unsuccessful. Does anyone know the reason as to why this would suddenly occur?
My email setting are as follows and haven’t been changed since I last sent emails a week ago.
EDIT TO ADD: Problem has been resolved. There was a change with my Hostname that I was unaware of.