zebfross

Contact Manager for SendGrid lets you automatically add new users to a specific SendGrid list. It also integrates with wpforms to add contacts to SendGrid from any form.
<h4>Privacy Policy & Terms of Service</h4>
I don’t use or even receive any data from this plugin, and you can use it however you want.
<h3>Usage Instructions</h3>
You will need a SendGrid API Key which can be found on the SendGrid dashboard under Settings -> API Keys.
Once you’ve downloaded and installed this plugin on your site, go to the Settings -> Contacts for SendGrid submenu to set your SendGrid API Key.
If you want to add users to a SendGrid list from a WPForms form, open the WPForms form and click on Settings -> SendGrid to specify your list and to map fields.
If you want to add new users to a list (like Subscribers), you can enable that option and choose which SendGrid list to add them to.
<h3>Actions and Filters</h3>
cmfs-add-on-register – This lets you customize when to add new users to your SendGrid contacts. You could use this to only add new users in a specific role. 
cmfs-register-list – This lets you customize which list new users are added to. You could use this to change the list based on user role.
<h3>Contact</h3>
zebfross@hotmail.com

Easily integrate SendGrid with your WordPress site

Contact Manager for SendGrid lets you automatically add new users to a specific SendGrid list.  It also integrates with wpforms to add contacts to Sen …

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.

Easily integrate SendGrid with your WordPress site vs Surbma | SMTP