hq-web

Hq Mail helps you control outgoing email in WordPress.
Features: 
* Configure sender email and sender name. 
* Enable or disable overriding third-party mail settings. 
* Choose mail transport: PHP mail or SMTP. 
* Configure SMTP host, port, encryption, and authentication. 
* Send test emails from the admin page and view detailed send logs.
<h3>Development</h3>
Source code is included in the /src directory.

hq-mail

Configure WordPress email sending with PHP mail or SMTP, sender settings, and test email logging.

cubefeed

The problem: SMTP email delivery by some hosting providers can be extremely slow. This plugin reconfigures the wp_mail() function to send email using HTTPS (via Elasticemail API) instead of SMTP and creates an options page that allows you to specify various options.
Plugin Settings Options:
<ul>
<li>Enable or Disable Plugin.</li>
<li>Elasticemail API username</li>
<li>Elasticemail assigned API Key</li>
<li>Elasticemail REST API URL</li>
<li>Your account channel variable(optional)</li>
</ul>

ElasticEmail Plugin

Reconfigures the wp_mail() function to send email using HTTPS (via Elasticemail) instead of SMTP and creates an options page to manage the settings.

hq-mail vs ElasticEmail Plugin