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http://codex.wordpress.org/Blog_by_Email
Post to your blog using email
Contents
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* 1 Setting Up Post via E-mail
o 1.1 Step 1 - Create an e-mail account
o 1.2 Step 2 - Configure WordPress to access your new account
o 1.3 Step 3 - Publish Your E-mail Posts
+ 1.3.1 Manual Browser Activation
+ 1.3.2 Automated Browser Activation
+ 1.3.3 WP-Cron Plugin Activation
+ 1.3.4 Cron Job Activation
+ 1.3.5 Procmail Activation
+ 1.3.6 .qmail Activation
* 2 Email Format
* 3 Testing
* 4 Troubleshooting
* 5 Extensions and Add-ons
o 5.1 Enhanced Functionality Hack
o 5.2 Hack E-mail Format
WordPress can be configured to use e-mail to post to a blog. To enable this functionality, you need to:
1. Create a dedicated e-mail account to be used solely for posting to your blog,
2. Configure WordPress to access that account, and
3. Configure WordPress to publish messages from the e-mail account
You can blog by e-mail using most standard e-mail software programs or a Weblog Client -- a program specifically designed to send posts via email.
Setting Up Post via E-mail
Step 1 - Create an e-mail account
1. Log in to WordPress with the administration login you use to administer your WordPress blog.
2. Go to Options > Writing.
3. Read the instructions under Post via e-mail at the bottom of the page. At the end of these instructions, WordPress will suggest three random strings of numbers you may want to use for the login name of the new e-mail account you'll create.
4. Create a new e-mail account on your web host's mail server or a separate e-mail server, using one of the suggested numeric strings (or your own secret word) for the username (also called a "login name"). A mail server receives e-mails on your behalf and stores them for retrieval. Do not use public, free e-mail servers like Yahoo, Hotmail, etc., for this account.
Note: It is strongly recommended that you use a "secret" address - that is, an e-mail account name that is very difficult to guess and known only to you, such as those suggested by WordPress. Any e-mail sent to this address will automatically be posted to your blog. Be aware, however, that some e-mail servers do not allow numbers-only e-mail accounts or....
http://codex.wordpress.org/Blog_by_Email