Thank you for replying!

Now I noticed that I can drag or import an image with the "image" button, when I'm replying to a message. 

However, when posting a new topic, neither of these works – neither drag nor "image" button.

So, I'll try to make a new topic, and reply to it myself. Hopefully that works.

Best,

Lauri

I cannot attach any jpg images to the post

 Same but now using the "Image" button in the toolbar.

I cannot attach any jpg images to the post

 Obligatory cat picture, 46K, Firefox on Windows, dragged into this reply

Please see my first message, safari and firefox

mmh, just tried it and it works fine. What browser are you using? 

Best Michel

Thanks for your reply. The files were very small (under 300kB), that should not be the issue. I tried to add them into the post, explaining the problem.

Could it be that the image size is to large. Max 4 MB are allowed per file and the file format has to be either png, jpg or bmp.
Are you trying to add it into the post or as attachment?

Best Michel