I’ve always been a fan of “Regards” or its somewhat softer sibling “Kind Regards”. Cordial and hard to infer anything negative out of it. I find signing off wit

I’ve always been a fan of “Regards” or its somewhat softer sibling “Kind Regards”. Cordial and hard to infer anything negative out of it. I find signing off with your name as you state in your comment to be equally professional and a bit more to the point, but I like a bit more cordiality as a matter of personal preference.