One of the good things about Gransnet is that it serves to remind you how different good manners are even in two countries that geographically quite close.
Here in Denmark, no-one would ever add kisses to a business e-mail, and if anyone did by mistake and a complaint was made by the recipient to the firm, boy! would there be trouble!
Back when businesses and government offices started using e-mails, most firms made templates that you had to use. If they did not use templates, they issued guide-lines that had to be followed, as the e-mail was a business communication.
So the problem with xxx = kisses hasn't arisen here. They are not commonly used in letters, either, except sometimes by children in the past, when children wrote letters to their grandparents. I have never received a letter from a close Danish friend with kisses, only from close British ones.
A medical professional who was over-familiar would be complained about too, here.