A related question ... I have a client who uses
nigel@uhhostedsite.co.uk which is redirected to his
nigel@sky.com address (Sky are his internet provider) and he uses Outlook Express to sent and receive these. Although in Outlook Express his 'sent from' address is set as "nigel@uhhostedsite.co.uk", Sky seems to showing the resulting emails as having come from "nigel@uhhostedsite.co.uk on behalf of
nigel@sky.com".
Is the answer then to suggest he uses GoogleMail as Terra mentions above, and he can then use Outlook Express to pick these up as previously?