rediffmail on iphone?

dear friends could you please help me by informing what should we fill in i phone setting to send /recieve email from rediffmail.com feilds are 1.imap account information name address descripiton 2.incoming mail server host name username password 3. outgoing mail server primary server other smtp server incoming settings use ssl (should i switch it on or off) -------------- i have iphone from o2 . and use bt broadband in uk. cheers shiva