So far I have seen several possible closing expressions to end your business emails with (assume I never wrote/talked to this person before). As I'm not a native speaker I'm not entirely sure about which of these is appropriate to be used in which context.
Which of the following are appropriate ways to end your business email:
- (with) regards
- (with) best regards
- (with) kind regards
Are some more formal than others?
I realize that this is highly specific to origin of the addressee, and might even be specific to certain industries. I'm interested in advice pertaining to contacts in the US or GB. (Should industry matter: assume IT industry, as in software engineering, technical consulting or the like).