Please remember to use your full email address as the username to log into both servers Incoming & Outgoing.
Mail Server incoming & outgoing is, The Word Mail(dot)Your-Domain-Name:
Eg. mail.DomainName.Com
Incoming port: 993 & SSL Must be on & secure connection to the server must be ticked.
Outgoing port: 465 & SSL Must be on & secure connection to the server must be ticked.
Picture as an example, the Domain name has been redacted in the picture:
