acsnaterse

This WordPress plugin blocks, by default, login attempts for the “admin” user. Because bots and hackers use automated login attempts on WordPress websites, specifically using the “admin” username, it’s a good practice to never use this username. This plugin will block all login attempts that try to use this username.
<h3>Features</h3>
<ul>
<li>Block “admin” user only</li>
<li>Block every user, but the usernames in your website.</li>
<li>Choose the URL you want to blocked users to be redirected to. We will <a href="https://www.youtube.com/watch?v=dQw4w9WgXcQ" rel="nofollow ugc">Rickroll</a> them by default. Of course.</li>
</ul>

Block user logins

Blocks every login attempt for the "admin" user, or every user, but the users in your install.

Gagan Deep Singh

guillaumemolter

livearoha

This plugin enables WordPress blogs of any size to deliver and track WordPress notification emails reliably, with minimal setup time and zero maintenance. No more SMTP errors or delivery problems with Postmark!
If you don’t already have a free Postmark account, you can get one in minutes. Every account comes with thousands of free email sends.
PLEASE NOTE: This is not official PostMarkApp Plugin. This plugin is a copy of the Official Postmarkapp plugin which had several critical bugs. The Official Plugin developers have not addressed these bugs for some time now, so I created a new plugin to solve those issues.
Issues fixed(from the official version):
<ul>
<li>Fixed the Connection Timeout bug</li>
<li>Fixed the Fatal Error due to incorrect usage of WP_Error object</li>
<li>Fixed the issue while parsing the headers sent as array to the wp_mail function</li>
<li>Fixed the breaking of plaintext when force html option is selected</li>
</ul>
New Features added:
<ul>
<li>Support for adding Cc, Bcc, and Reply-To headers</li>
<li>Support to filter the arguments by other plugins like its done in the actual wp_mail() function of WordPress</li>
<li>Auto import settings from the Postmarkapp approved WordPress plugin for easy migration</li>
</ul>
Roadmap:
<ul>
<li>Support for attachments</li>
<li>Handling special characters in Subject</li>
<li>Ability for dynamic “From” addresses by verifying from PostmarkApp</li>
</ul>
To know more about PostMarkApp, please visit this link: http://postmarkapp.com
To get help about PostMarkApp, please visit this link: http://support.postmarkapp.com/

PostmarkApp Email Integrator

Enables your WordPress site to send emails via PostMarkApp API.

Block user logins vs PostmarkApp Email Integrator