I've been hoping WordPress would allow us to post HTML emails on blog. However, it's being stripped (see http://codex.wordpress.org/Blog_by_Email#Email_Format).
Postie doesn't work anymore and I tried to fix it with no luck.
Anyone from WordPress needs to revise http://codex.wordpress.org/Blog_by_Email and remove any reference to Postie. Many of us have tried to contact the author and he has not reply.
If there's another plugin, I'm willing to try. I tired Chimpexpress but it's take up lot of my time to post the email (it's a great plugin but more need to be fixed).