Error message on phone: "pop3/imap access is not enabled for this account"

[#1]

Trying to add a plusnet e-mail to my phone, but get the above error message.

Any thoughts on how to enable pop3/imap? - can't see any useful setting within my plusnet webmail account.

Many thanks

[#2]

Found the answer myself via PN chat - it wasn't the imap/pop3 authentication which was the problem, it was failing to type in the full username ([username]+[e-mail]) - gets me every time.