Hi – mimecast seems to be blocking images in our emails, we are hosting them on our branded sub-domain. But they all come through as:
We can potentially get IT to allowlist these but this will not solve the problem for others. The strange thing is the social images still get displayed, when I check these are still hosted on our sub-domain. The only difference I can really see is other images have url params attached e.g.
?upscale=true&width=600&upscale=true&name=Newsletter-connecting-us-2025-06-30.png
Any ideas what might be causing this and how can we resolve. There doesn’t seem to be a way to remove these params or even use an image hosted somewhere else.