Frage: Mail shows blue question marks instead of pictures
i have a new MacBookPro 13" (Dec 2017) with macOS 10.13.2 (17C205) and Apple Mail shows blue question marks instead of tif-pictures in a mail. When i open the same Mail on my iPad or on my iPhone, I see the pictures without any problems. Whats going wrong? (I use gmail).
Thanks & Regards,
MacBook Pro, macOS High Sierra (10.13.2)