License pricing for two laptop same person

I know, business is business, but I have two laptop and I would use your email client.
Can I buy one single license and install it to my two machines ?

You can, but you will need to deactivate it on one computer before you activate and use it on the other. Then do the whole thing in reverse when you want to use the first computer again.

This is because the license is per computer, not per user.