Hi, whenever my computer downloads emails, if there are images (such as hyperlinks to webpages for example, attached to images) these images are briefly downloaded and then deleted. I have no way of restoring the email images after that. I can see the images being downloaded in the email (very briefly) when retrieving emails, and then they disappear, leaving vacant boxes in the email contents. I have checked the box in Preferences (Allow remote content in messages) but this does not help. I am running Thunderbird 68.2.2 (64Bit) on my Ubuntu 18.04 LTS 64Bit system. I also have Pi-hole remotely installed on a separate computer on my home network, and it is responsible for blocking illicit Internet access etc. With that said, Pi-Hole would either permit (or not permit) access to specific web resources, and I don't see how it could/would allow the download of what it considers to be dangerous content, and then delete it. I just mention it in case somehow it is part of the problem. Thank you.