Surbma

CherryPick Studios

This plugin is created especially for Multisite Networks. You can define all variables in the wp-config.php file and it will be valid for all sites in a Multisite. So this is not for a site-by-site configuration plugin. You can install it on a single WordPress install also and it will work perfectly. But if you install it in a Multisite Network, you can only network activate it!
This plugin is working with all SMTP servers and services, like Mailgun, SendGrid, Mandrill, Amazon SES and others.
Required variables:
<ul>
<li><code>SURBMA_SMTP_HOST</code> – External SMTP server.</li>
<li><code>SURBMA_SMTP_USER</code> – User for the SMTP account.</li>
<li><code>SURBMA_SMTP_PASSWORD</code> – Password for the SMTP account.</li>
</ul>
Optional variables:
<ul>
<li><code>SURBMA_SMTP_PORT</code> – Port number for the SMTP server.</li>
<li><code>SURBMA_SMTP_SECURE</code> – Choose SSL or TLS, if necessary for your SMTP server.</li>
<li><code>SURBMA_SMTP_FROM</code> – From email address for all outgoing emails.</li>
<li><code>SURBMA_SMTP_FROMNAME</code> – From name for all outgoing emails.</li>
</ul>
Example configuration:
<pre><code> define('SURBMA_SMTP_HOST','smtp.mailgun.org');
 define('SURBMA_SMTP_USER','postmaster@surbma.com');
 define('SURBMA_SMTP_PASSWORD','bb2b************************4133');
</code></pre>
You can put these lines everywhere before the line, that says: “That’s It. Pencils down”
Do you want to contribute or help improving this plugin?
You can find it on GitHub: <a href="https://github.com/Surbma/surbma-smtp" rel="nofollow ugc">https://github.com/Surbma/surbma-smtp</a>
You can find my other plugins and projects on GitHub:
<a href="https://github.com/Surbma" rel="nofollow ugc">https://github.com/Surbma</a>
Please feel free to contribute, help or recommend any new features for my plugins, themes and other projects.
Do you want to know more about me?
Visit my webpage: <a href="http://surbma.com/" rel="nofollow ugc">Surbma.com</a>

Surbma | SMTP

External SMTP mail configuration via global variables in wp-config.php.

WP Zone

annaqq

Connect SendGrid for Emails is a third-party fork of (and a drop-in replacement for) the official SendGrid plugin. This plugin is not endorsed by or affiliated with SendGrid. This plugin connects to an external service (the SendGrid API).
The Connect SendGrid for Emails plugin replaces WordPress’s default wp_mail() function by using either an SMTP or API integration with SendGrid to send outgoing email from your WordPress installation. It also allows you to upload contacts directly to your SendGrid Marketing Campaigns account via a subscription widget.
By using the Connect SendGrid for Emails plugin, you will be able to take advantage of improved deliverability and an expanded feature set, including tracking and analytics, to enhance user engagement on your WordPress installation.
<h4>The Subscription Widget</h4>
The WordPress Subscription Widget makes it easy for people visiting your WordPress site to subscribe to your marketing emails, such as any newsletters, announcements, or promotional offers you may send. Upon signup, they’ll automatically receive an opt-in email allowing them to confirm their desire to begin receiving your emails. This confirmation constitutes “double opt-in,” a deliverability best practice.
<h4>Multisite</h4>
If you are using the Connect SendGrid for Emails plugin in a Multisite environment, you need to Network Activate it. You can then access the settings page on the network dashboard and the configure settings will be used for all sites.
You can enable access for SendGrid settings to each subsite in the Multisite Settings tab. If the checkbox is unchecked then that site will not see the SendGrid settings page and it will use the settings set on the network. 
Warning! When you activate SendGrid management for a subsite, that site will not be able to send emails until the admin updates the SendGrid settings on that subsite.
If you already had the plugin installed in a Multisite environment and you update to versions after 1.9.0 you may need to reconfigure your plugin.

Connect SendGrid for Emails


I spent long hours looking for a solution to send emails on my restricted hosting account. Out of despair, I tried all the plugins in the repository that modified the wp_mail() function (incl. plugins with millions of installations) but none of the commercial plugins out there come even closer to what this simple but effective plugin provides! I was able to connect to sendgrid for seconds, just adding api key and sender's address. Plugin supports multisite (free versions of other commercial plugins lacking this) and had all the options I needed, e.g. not showing the plugin settings on a single instance. 


Best Free Plugin for Sendgrid integration

Connect SendGrid to your WordPress site to send emails using SendGrid's cloud-based email platform.

Surbma | SMTP vs Connect SendGrid for Emails