Everything working on my iphone but my btinternet email won't send on my laptop - can't see how you check, change or update outgoing settings as you can on the iPhone. Any ideas?
Are you using a web browser or an email client/app on your laptop?
If you are using a web browser you can not change any settings regarding the server etc used.
Have you tried restarting your laptop?
Have you tried restarting your BT Hub?