pCoLaSD

holzhannes

This plugin configures WordPress and WordPress MU to use a SMTP server when sending emails instead of the default PHP <code>mail()</code> function.
You will configure your SMTP settings in your <code>wp-config.php</code> file instead of the settings page. 
The advantage is that no admin of your blog can read the settings. 
And you only have to place your settings once in cases of a WordPress MU installation.
A sample configuration:
<pre><code>/**
 * WordPress SMTP server
 */
define('WP_SMTP_HOST', 'mail.example.com');
define('WP_SMTP_PORT', 25); // obligatory - default: 25
define('WP_SMTP_ENCRYPTION', 'tls'); // obligatory ('tls' or 'ssl') - default: no encryption
define('WP_SMTP_USER', 'username'); // obligatory - default: no user
define('WP_SMTP_PASSWORD', 'password'); // obligatory - default: no password
define('WP_SMTP_FROM', 'John Doe <john.doe@example.com>'); // obligatory - default: no custom from address
define('WP_SMTP_REPLYTO', 'Jane Doe <jane.doe@example.com>'); // obligatory - default: no custom reply to address
</code></pre>

WP SMTP Config

Configure an external SMTP server in your config file.

hildende

Birmania

This plugin adds emails to a mailing queue instead of sending immediately. This speeds up sending forms for the website visitor and lowers the server load. 
Emails are stored as files which are deleted after emails are sent.
You can send all outgoing emails via an SMTP server or (the WordPress standard) PHP function <a href="http://php.net/manual/en/function.mail.php" rel="nofollow ugc">mail</a>, and either use <a href="https://codex.wordpress.org/Function_Reference/wp_cron" rel="nofollow ugc">wp_cron</a> or a cronjob (if your server/hoster supports this) to process the queue.
Plugin requires PHP 5.4 or above.
Tools:
<ul>
<li>You can send test mails to test your setup.</li>
<li>You can process the mailing queue manually instead of waiting for cronjob.</li>
</ul>
Supervisors: 
* You can display basic informations about mail processing performances 
* You can display the mailing queue in the backend to see emails that will be sent with next processing. 
* You can display the invalid mails and delete or retry them. 
* You can display the sent mails and delete them.
Coming soon:
<ul>
<li>Storing mailing data in database instead of files.</li>
<li>Using plugin for SMTP mails without using mailing queue.</li>
</ul>
Feel free to suggest features or send feedback in the <a href="https://wordpress.org/support/plugin/smtp-mailing-queue" rel="ugc">support section</a>, via <a href="mailto:antoine.brultet@gmail.com" rel="nofollow ugc">email</a> or by creating a pull request on <a href="https://github.com/Birmania/smtp-mailing-queue" rel="nofollow ugc">github</a>.

SMTP Mailing Queue

Add emails to a mailing queue instead of sending immediately to speed up sending forms for the website visitor and lower server load.

WP SMTP Config vs SMTP Mailing Queue