Oh dear. An article in the New York Times explains all.

“So many people are not clear communicators,” said Judith Kallos, creator of NetManners.com, a site dedicated to online etiquette, and author of “Because Netiquette Matters.” To be clear about what an e-mail message is trying to say, and about what is implied as well as what is stated, “the reader is left looking at everything from the greeting to the closing for clues,” she said.

Mr. Troutwine [a chap described earlier in the piece] is not alone in thinking that an e-mail sender who writes “Best,” then a name, is offering something close to a brush-off. He said he chooses his own business sign-offs in a descending order of cordiality, from “Warmest regards” to “All the best” to a curt “Sincerely.

”When Kim Bondy, a former CNN executive, e-mailed a suitor after a dinner date, she used one of her preferred closings: “Chat soon.” It was her way of saying, “The date went well, let’s do it again,” she said.

She may have been the only one who thought that. The return message closed with the dreaded “Best.” It left her feeling as though she had misread the evening. “I felt like, ‘Oh, that’s kind of formal. I don’t think he liked me,’ ” she said, laughing. “A chill came with the ‘Best.’ ” They have not gone out since…

Why is this interesting? Well, simply that I’ve always innocently signed off my email messages with “Best”. No wonder I have such an uneventful social life. Sigh.