This has been raised before and a fix was promised but not delivered. The system often ignores the font settings - I use Arail 12 point for body and signature and it looks correct on my system but what arrives at the other end is usually 10 point for body and Arial 12 for the signature, which is embarrassingly poor. I have even changed IE to Arial but the problem persists.
The only way I can get it to work is to set everything to Arial 10 -
Hi Andrew, is the recipient also using eM Client, e.g. is the display issue with eM Client or other applications? Note that each application can use a different stylesheet and text formatting, thus text formatting may differ between eM Client and some other client.