Unable to send email from ipad and iphone, the sender address is rejected by the server
I have BT broadband and email. Usually I can use the email on my iphone and ipad but when I'm overseas (as I am now) I receive emails on these devices but I can't send them from either device, it gives the message sender address is rejected by the server. Everything works on web mail. I've checked all the server settings and passwords for the outgoing server and can't see any problem.