@Roger : Yes, this is one of our problems with the languages. Currently, we greet with “Guten Tag XX,”, where XX is the first name. We only do this because more fitting solutions would be way too complicated for our newsletter.
But for germans, this is a very rude way of speaking, especially if there is no first name and the greeting is only “Guten Tag ,” (remark the useless space in front of the comma here), which is totally not a normal greeting term without a following name in german.
The “perfect” solution would be if we could greet based on a gender setting.
For example for mister/miss "Meier it would be “Guten Tag Herr Meier,” or “Guten Tag Frau Meier,” respectively. And there would be a fitting option for missing gender settings, too. It would be way more polite!