I need to override default colors in received HTML emails. I have followed this Howto, and modified my userContent.css accordingly. Basically, I need white text on dark background:$ cat userContent.cssbody {  color: white !important;   background-color: #303030 !important;}td {  color: white !important;  background-color: black !important;}This works OK for the background color, but the my desired font color (white) is being ignored, even when I use !important.How can I make sure, that all received HTML emails have white font on dark bacckground?
Thunderbird: Override colors in received HTML emails
email;html;thunderbird
You have changed the colors only on two HTML elements (body and td). You may need to do that for other elements, or * for all elements.