Hello, I've come across a rather strange problem. I have a phplist mailing list (on domain1). When sending emails, I usually also add an image (as a link to the image). Since the beginning of June, however, I've noticed that Thunderbird doesn't display the images added in this way. Instead of the image, it displays an empty frame (a completely empty frame without any tags). Even if "Allow remote content in messages" is checked in the settings. Other email clients (outlook, gmail, roundcube) have no problems and display images without any problems. However, if I put the image on another domain (domain2) and put a link to this image in the email, Thunderbird also displays it. So: it doesn't display the image from domain1, where I have the mailing list, but it displays the same image from domain2 (in the same email from the same mailing list from domain1). Is it possible that Thunderbird is blocking the display of images from a certain domain?