Open up IMail
Mail > Preferences > Accounts
Incoming Mail server: fir.securehost.ie or pine.securehost.ie (Which one?)
Username: email address
Password: yourpassword
TLS: None
Click on Outgoing Mail Server list > Edit
Custom Port 25 or 465
Authorisation: Password
Username: email address
Password: yourpassword
Tick "Use Secure Sockets"
Click on Incoming Mail Server Tab
Server: fir.securehost.ie or pine.securehost.ie (Which one?)
Username: email address
Password: yourpassword
TLS: None
Port 143 or 993