At least in Microsoft Outlook, changing the encoding of your outgoing messages might fix the issue. Here's how to find the setting in Outlook:
1. Go to File
2. Go to Options
3. Select Advanced and scroll down to the International Options. You’re looking for the “Preferred encoding for outgoing messages” option.
The default setting usually is Western European, but we would recommend to change it to UTF-8. After that, the email encoding should work correctly.
Please contact us if you have any questions or comments about this!