Sign in to your blog page if you haven’t already.
Click on the Settings tab:
Then on the Email link:
In the Mail-to-Blogger Address section, add a word in the empty box between your Gmail name and the @blogger.com bit. It doesn’t matter what word it is, but best not to make it too long or complicated. This is just to reduce the chances that other people will try to post to your blog.
Select whether you want your posts to appear immediately, or to wait for you to edit them first online:
Click on the orange button:
That’s it.