I have set html in signatures and yet from email to email the reply window formats the signature and my body text differently (it's trying to mimic the fonts used in the sender's email.

Sometimes I see the font as sans-serif (not installed) in the formatting window in reply mode.

Defaults:

Display font is in latin (no option for western, unicode or central european).

Composition font is as it should be Send options have 'allow messages to use different font' disabled.

How do I solve this?

Oh god this problem drives me nuts. I know this is from the original senders CSS code but what can I do about it if I don't want the user to edit HTML?