This is a guide only, if you need further help, please enlist the help of an IT professional who is trained in different devices and email clients.
POP Settings
Incoming Mail Server Settings:
Server Name: mail.cms-tool.net
Port: 110
Connection Security: SSL/TLS
Authentication Method: Normal
Outgoing Mail Server settings:
Server Name: smtp.cms-tool.net
Port: 587
Connection Security: STARTTLS
Authentication Method: Normal
IMAP Settings
Incoming Mail Server Settings:
Server Name: mail.cms-tool.net
Port: 993
Connection Security: SSL/TLS
Authentication Method: Normal password
Outgoing Mail Server settings:
Server Name: smtp.cms-tool.net
Port 587
Connection Security: STARTTLS
Authentication Method: Normal password
Setting up the mailbox in Thunderbird
Screenshots as at Dec 2023
Updating what happens with email downloaded (POP Email settings)