We community members will come together to try and help you. To do that we need to ask the right questions and get the answers to those questions.
I too run a .co.uk domain of my own, when I send outbound email I don't do it through Virgin Media's SMTP servers. So were I to be asked what SMTP server do I use - I would say box.timothydutton.co.uk
I already know that you are talking to the server due to the fact that the iPad says "Recipient address rejected." However we still don't know if this is fasthosts SMTP server or Virgin Media's.
Quite frankly the fact that it's worked ok for the last 18 months means nothing to me. What matters to me is what is happening now. The iPad is notoriously bad at users being able to find the actual error message that is returned from the server, as the error message lacks a lot of details.
This is why I asked if you could duplicate the problem with Thunderbird or Outlook?
BTW - SMTP doesn't know what type of device is connecting. All it sees is a connection on the SMTP port and handles the traffic as normal.
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