You can post to your Pro blog by email, by going to the Settings page, Email tab, and adding a "Secret Mail-to-Blogger Address", which is in the form bloggerUsername.secretPart@blogger.com (that is, your Blogger username, a dot, something secret that you make up, @blogger.com). If you want the blog to be published when you email it, check the "Publish" checkbox, and then click "save changes." Then, anything you send to that address will be posted to your blog (posted and published if you have Publish checked), with the email subject as the title, and the body of the email as the body of the post. In theory.
There are a couple of gotchas. The secret address is for the particular team member who is signed in at the time, but because it is in Settings, you can only get there while signed in as an admin. If you have a group blog with non-admin team members, to let them post by email you will have to make them admins (by clicking "Team" on the top toolbar, then checking the box in the admin column by their name), let them add a secret part to their Mail-to-Blogger address in Settings, and then de-admin them (the address stays valid after they are no longer admins). I can imagine that resulting in some social friction in some situations. Also, if you have a space in your Blogger username, you may or may not be unable to send email to Blogger for that username. In my experimenting, one of the mail servers I tried was able to successfully send to "user firstname.lastname@example.org" (even though a space in an email address should be illegal), but none of my other servers made it through, and examining the headers on mail sent through that server didn't offer any enlightenment (it seems to send it as email@example.com, but if you try addressing mail to that, it will bounce). Puzzling. The "simple" workaround is to create a new Blogger user, without a space in the username, invite that user to join your blog, make her an admin, add a secret Mail-to-Blogger word, and then only use that address to email your blog. The one thing to remember is that your new user is not a Pro, so for the smoothest results, when you are switching between being logged in as you, to invite and admin, and her, to accept and change settings, you will want to sign out of both Pro and Classic Blogger, and then sign back in to the appropriate one for each username.
The most fun way to use email-to-blog would be if someone can find a scheduled-email service that sends email without adding any tell-tale ad to the message, so that we could have the post-and-publish-to-the-future we were hoping that post-to-the-future would be. It's a darn shame that, as near as I can remember, mailtothefuture.com (run by Blogger competitor UserLand) does add in a "Sent by mailtothefuture.com" line. If you know of one that doesn't, we would be delighted to hear about it.