You are right. I was fixed enabling Custom SMTP and set port 25 and all parameters there:
7a415c76-1996-4413-9051-37f5ae283b9d-image.png
Where did you put it? It seems to work fine for me when I put it in custom css in ACP.
Make sure custom css is enabled as well.
@y-h #red
is not a color (just red
is), but other than that I can assure you there is nothing wrong with this CSS and the problem lies elsewhere:
Custom CSS:
With the original transparent color: