What I've got for my ntlworld account on my iPod touch is:
POP Account Information
Name: (My name)
Address: (email address you want)
Incoming Mail Server
Host name: pop.ntlworld.com
User Name: (I'm guessing this is your ntlworld user name)
Password: (your password)
Outgoing Mail Server
Make sure POP3/SMTP/IMAP4 SSL and SMTP/POP3/IMAP4 authentication is enabled. POP3/IMAP SPA (Secure Password Authentication) is disabled.
Also see this
*Note: Some customers who access their @ntlworld.com email account with certain clients, such as Outlook 2007, may need to switch off SMTP authentication - only if they're experiencing difficulties sending email using the settings given above. They can do this by unticking 'My outgoing server (SMTP) requires authentication'. Alternatively, upgrading to a different version of Outlook will resolve the issue.
Note: if you wish to receive e-mail via POP3 on more than one device (e.g. multiple PCs or a PC and a smartphone), enable 'recent:' mode. For more information, see How do I download mail from the same account on more than one PC or mobile device, using "recent" mo...