Standard mail settings for clients

Inbound email

Type is IMAP
Server is
Port is 993
Security is SSL, or TLS
No imap prefix

For authentication, your username is not your email address, it's the username that Tom provided you with. It will not have an @ sign in it. Your password will also have been provided by Tom.

Outbound email

Server is
Port is 587, or failing that, 25
Security is STARTTLS, or TLS

For authentication, use the same username and password as you used for inbound email (see above).