It's very simple, just log into your blogger account, go to settings and then click on the email and mobile tab. You will then find an option to complete the name of the email account where you will have to send an email to, to post automatically on your blog. Now, put in your 'SecretWord' and then from any email account at all, just send in the email.
If your email account tends to add some extra bits of stuff at the bottom of the email, just add #END at the end of your post.
We'll I am testing this out so lets see how it goes!