Ironically, I just got a response back from Worldmate that they can't support the Jet Airways itinerary email that I forwarded to them last week. They used to do it before - and I've emailed back asking why not.

Only time I've not had success before this is when I asked them to add support for Indian Railways - but they had a genuine reason, as the confirmation emails from IRCTC don't have the train times and Worldmate can't deal with that with the automatic system (though you can add it manually).