To post to your blog via email, you need to configure your Mail-to-Blogger email address in Settings | Email:
Also be sure to specify whether or not you prefer your email posts to publish automatically. If this option is not checked, then your posts will be saved on your account but will not appear on your blog until you log in to Blogger.com and publish them yourself.
Once you have saved your Settings, you can send email to your blog. The subjects of your email letters will be the titles of your posts, and the body of the emails will be the posts themselves. To include an image in your post, you can attach an image to you your email.
• Sometimes email programs append text to the bottom of each sent message; to make sure this cruft doesn't get posted to your blog, put #end at the end of your post.