Flash export to animated gif

I have made a relatively short movie ( 90 frames ) and am trying to make it an animated gif so that I can attach it to emails. When export it everything looks crisp and smooth except the text looks awful - all pixelated. Increasing the resolution that the movie is exported at does not help. The text looks horrible even at 300 dpi. How can I make the movie an animated gif and keep the font looking good? Is there any way to make it look as crisp as in the swf. I have tried different anti-aliasing settings but nothing seems to work.