To be honest I borrowed the idea of publishing via email from Hey World. That platform is too minimal but it's nice that you can post also by sending an email, so I implemented this feature in DynaBlogger right away because I think people might like it :) The way it works is very simple. Each blog gets a unique email address, you or another user with access to the blog sends an email to that address and the post is published immediately. Images and code blocks are supported. The format is expected to be Markdown, so it's best to send the email as plain text to avoid complications depending on the email client. For now the editor in the app is Rich Text only but I am planning to add Markdown there too if I see it requested. :)
Thanks again for the nice feedback!