[MovedGoalPosts]

It is a common thing for most ISPs to block the sending of email through their own servers unless you are directly connected to them. The alternative is that they will need some level of password authentication, something you only nornmally get if you have a hosted domain and mail service.

As far as I can tell, provided you have the email account setup properly in Outlook Express, especially the email address and reply to address as your wanadoo one, the recipient will not realise you have sent through ntl, beleiving you have used the wanadoo account, unless they do a more detailed check and look at the mail headers. The critical thing, for you is that if they reply to the email, or add you to their address book is they will have your wanadoo email addy, not an ntl one.