Post to Posterous only: posterous@posterous.com
Post Everywhere: post@posterous.com
For instance:
E-mail Subject: It really does smell like teen spirit ((tag: grunge, nirvana))
becomes:
It really does smell like teen spirit http://post.ly/1a2bx #grunge #nirvana
Read how to enable {{hash_tags}} on your Twitter autopost
Put ((nogallery)) in the subject line and your images will appear without the gallery view.