To set up email posting, simply click the envelope icon next to a specific blog from your dashboard. You'll then be prompted to create a secret email address for your blog. Emails sent to this address will be posted to your blog, and photo attachments will be inserted between the post's title and body.
iPhone tip: SMS does not support photos, and the iPhone does not support MMS. To post pictures from your iPhone to your blog, set up email posting and email the photos to your blog's secret email address. (For help on setting up email on your iPhone, see Apple's "
Email account setup" help article.)