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.

Rasheduzzaman khan

Mehedi Hasan Shawon

waatechdigital

Ibrahim khalil

OrangeToolz

OrangeSMTP replaces WordPress’s default mail function with a reliable SMTP connection, ensuring your emails actually reach the inbox — not the spam folder.
Whether you’re running a WooCommerce store, a membership site, or a business blog, OrangeSMTP gives you complete control over how your WordPress emails are sent, tracked, and monitored.
<h3>Why WordPress Emails Fail</h3>
By default, WordPress sends emails using the PHP <code>mail()</code> function, which has no authentication. Most email providers reject or silently drop these messages. OrangeSMTP routes your emails through a trusted SMTP provider with proper authentication, so your messages are delivered reliably every time.
<h3>12+ Email Providers Supported</h3>
Connect to the provider that works best for you:
<ul>
<li>Gmail / Google Workspace — Send using your Google account with App Password or OAuth</li>
<li>Mailgun — API + SMTP with open & click tracking</li>
<li>Amazon SES — High-volume sending with AWS reliability</li>
<li>SendGrid — Industry-leading deliverability</li>
<li>Brevo (formerly Sendinblue) — Free tier with generous limits</li>
<li>Zoho Mail — Ideal for Zoho Workspace users</li>
<li>Postmark — Built for transactional email</li>
<li>SparkPost — Enterprise-grade delivery</li>
<li>SMTP.com — Dedicated SMTP infrastructure</li>
<li>Resend — Modern API-first email service</li>
<li>MailerSend — Transactional email with templates</li>
<li>Generic SMTP — Any provider: Yahoo, Outlook, Hotmail, and more</li>
</ul>
<h3>Failure Alert Channels</h3>
Get instantly notified the moment an email fails to deliver — before your customers notice:
<ul>
<li>📧 Email — Alert sent to any address</li>
<li>💬 Slack — Post to any Slack channel</li>
<li>🎮 Discord — Send to a Discord webhook</li>
<li>📱 Telegram — Message via Telegram bot</li>
<li>🔷 Microsoft Teams — Post to a Teams channel</li>
<li>🔗 Custom Webhook — Connect to Zapier, Make, n8n, or any HTTP endpoint</li>
</ul>
Each channel can be enabled, disabled, and tested independently from the Failure Alerts page.
<h3>Email Log & Tracking</h3>
Every outgoing email is logged with full delivery details:
<ul>
<li>Sent / failed status</li>
<li>Provider used</li>
<li>Delivery timestamp</li>
<li>Open tracking</li>
<li>Click tracking</li>
<li>Error messages for failed emails</li>
</ul>
<h3>Email Template Builder</h3>
Design professional transactional emails with the built-in template editor:
<ul>
<li>Rich HTML editor with live preview</li>
<li>5 built-in starter templates</li>
<li>Custom templates with your own branding</li>
<li>Fallback plain-text generation</li>
</ul>
<h3>Routing & Failover</h3>
<ul>
<li>Smart Routing — Route emails to different providers based on from-address, subject keywords, email type, or source plugin</li>
<li>Failover / Circuit Breaker — Automatically switch to a backup provider when the primary fails; circuit reopens after 30 minutes</li>
</ul>
<h3>Setup Guides</h3>
Step-by-step setup guides are built into the plugin for every provider and every alert channel — no documentation tab switching needed.

OrangeSMTP – Connector any SMTP  Plugin, Report and  Bulk mail


I've been using Orange SMTP on a few WordPress sites, and it works flawlessly. The setup is straightforward, and email deliverability has improved significantly. No bloat, no unnecessary options—just a clean, efficient solution for SMTP. Highly recommended!


Simple and Effective SMTP Plugin

Fix WordPress email delivery with OrangeSMTP — connect to 12+ providers, track every email, and get instant failure alerts across 6 channels.

Surbma | SMTP vs OrangeSMTP – Connector any SMTP Plugin, Report and Bulk mail