I have used Mozilla Thunderbird for a long time, and created a well-polished HTML signature that works perfectly with Thunderbird.
How is it possible to use the same signature inside of Apple Mail? As far as I know, it does not support HTML signatures (which, perhaps, is a valid security policy, but works against the needs of our team).
If there is no way to inject the HTML code, what would be the better way to approach this issue?