Hi guys,
I think we should clarify just what kind of business emails we are talking about here. In his original post, Bubeldk spoke of his company going into a new country. Perhaps he/she might give us a short example of such an email. Failing that, the other posters should do this, to show how they want to end such a thing. Otherwise, I suspect we are all envisaging and discussing different things.
For example, is it an initial approach to initiate a business relationship? Do we know the person we are writing to? Is it a minor administrative matter, like asking if we have received a shipment? Is it 10 paragraphs to discuss the design of a new product, or one line that says something like 'We shipped 10 cases of widgets to you today, invoice no. 123345'.
I would even attempt to argue that there is no such thing as a truly formal email. By definition, it's a less formal medium. If my small company wanted to make an initial approach to IBM to do business, I wouldn't even use email. I'd take the best quality paper I could find and go to a printer and get the most impressive-looking letterhead I could dream up. Then I'd write a letter and mail it. Email is for flunkies and middle-managers, as well as for snake-oil salesmen and spammers.
Yours faithfully, Kind regards, Hasta La Vista baby,
Clive
PS - Sextus, you said All the best, All the best wishes (it's actually just 'Best wishes', I know, that's my tag line on the Forum) , Cheers, which I think are neither formal nor informal. No, these are all informal, particularly 'Cheers'!