Technology is so (not) amazing sometimes:

I can send HTML-emails with #Thundebird with inline images from Linux without any problems, but when I attach the same image or forward the mail on with Thunderbird #Windows the images just disappear!

It's not that they're hidden, it looks like they're gone completely (I cannot see them with #SOGO on our mailserver as well).

What #cyberwizardy is this!?