Xosen

When a post is published or updated, this plugin will send a backup email to the administrator of the WordPress 
blog with an attachment file that contains the post in XML format. The XML follows the format used when WordPress 
exports blog contents so that it can be easily used to restore the post.
The general idea of this plugin is to never loose any of your posts. If you have scheduled a backup of your 
blog once a week, its possible that you will loose the new posts published during that last week. With this 
plugin you will have a backup of all your new published posts in your email account.

New Post Automatic XML Backup by Email

When a post is published, a backup email is send to the admin with the post content in XML format.

Matthias Pfefferle

David Shanske

IndieWeb

Ryan

Micropub is an open API standard that is used to create posts on your site using third-party clients. Web apps and native apps (e.g. iPhone, Android) can use Micropub to post short notes, photos, events or other posts to your own site, similar to a Twitter client posting to Twitter.com. Requires the IndieAuth plugin for authentication.
Once you’ve installed and activated the plugin, try a client such as <a href="http://quill.p3k.io/" rel="nofollow ugc">Quill</a> to create a new post on your site. It walks you through the steps and helps you troubleshoot if you run into any problems. A list of known Micropub clients are available <a href="https://indieweb.org/Micropub/Clients" rel="nofollow ugc">here</a>.
Supports the full <a href="https://micropub.spec.indieweb.org/" rel="nofollow ugc">Micropub spec</a>.
As this allows the creation of posts without entering the WordPress admin, it is not subject to any Gutenberg compatibility concerns per se. Posts created will not have Gutenberg blocks as they were not created with Gutenberg, but otherwise there should be no issues at this time.
Available in the WordPress plugin directory at <a href="https://wordpress.org/plugins/micropub/" rel="ugc">wordpress.org/plugins/micropub</a>.
<h3>Filters and Hooks</h3>
<h3>Filters</h3>
<pre><code>before_micropub( $input )
</code></pre>
Called before handling a Micropub request. Returns <code>$input</code>, possibly modified.
<pre><code>micropub_post_content( $post_content, $input )
</code></pre>
Called during the handling of a Micropub request. Returns <code>$post_content</code>, possibly modified.
<pre><code>micropub_post_type( $post_type = 'post', $input )
</code></pre>
Called during the creation of a Micropub post. Defaults to post but allows setting a custom post type.
<pre><code>micropub_tax_input( $tax_input, $input )
</code></pre>
Called during the creation of a Micropub post. Allows setting custom taxonomy.
<pre><code>micropub_syndicate-to( $synd_urls, $user_id, $input )
</code></pre>
Called to generate the list of <code>syndicate-to</code> targets.
<pre><code>micropub_query( $resp, $input )
</code></pre>
Allows you to replace a query response with your own customized version.
<pre><code>micropub_suggest_title( $mf2 )
</code></pre>
Allows a suggested title to be generated for the post slug.
<pre><code>pre_insert_micropub_post( $args )
</code></pre>
Filters the arguments sent to wp_insert_post just prior to insertion.
<h3>Hooks</h3>
<pre><code>after_micropub( $input, $wp_args = null )
</code></pre>
Called after handling a Micropub request. Not called if the request fails.
<pre><code>micropub_syndication( $ID, $syndicate_to )
</code></pre>
Called only if there are syndication targets for the post.

Micropub

Great plugin that supports a very worthy movement in wordpress

great plugin

Allows you to publish to your site using Micropub clients.

New Post Automatic XML Backup by Email vs Micropub