Denys Cherkasov

The default <code>wp_mail()</code> function in WordPress can often be unreliable. Many hosting providers limit or poorly configure email sending, which leads to important notifications (like registrations, password resets, or WooCommerce orders) ending up in spam or not being delivered at all.
Cherkasov SMTP Mailer solves this problem by re-routing all your site’s outgoing emails through a professional SMTP server (such as Gmail, SendGrid, or any other mail service). This significantly increases the reliability and deliverability of your emails.
The plugin features a modern, intuitive interface, an advanced email log, and the ability to receive instant notifications about sending statuses in your Telegram.
<h3>Features</h3>
<ul>
<li>Reliable Delivery: Send emails through any SMTP server to avoid spam filters.</li>
<li>Easy Configuration: Quick presets for popular services (Gmail, Outlook, SendGrid) and flexible options for any other SMTP provider.</li>
<li>Email Log: Keeps a detailed log of all sent emails. View content, status, headers, and error messages.</li>
<li>Log Management: Search for emails, resend failed messages (one by one or all at once), and delete entries.</li>
<li>Telegram Notifications: Get instant messages in Telegram about successfully sent or failed emails.</li>
<li>Testing Tool: A built-in feature to send a test email to verify your settings and see a detailed debug log.</li>
<li>Security: Passwords and tokens are not displayed in the form after being saved and are transmitted securely.</li>
<li>Modern UI: A clean, responsive, and user-friendly interface built with modern web technologies.</li>
<li>Retention Policies: Configure automatic deletion of old log entries to keep your database clean.</li>
</ul>
<h3>Configuration</h3>
After activating the plugin, go to Settings > Cherkasov SMTP Mailer.
<h4>1. Main SMTP Settings</h4>
<ol>
<li>Mailer:
<ul>
<li>SMTP: Choose this option to send emails via an external server.</li>
<li>Default WP Mailer: Use your host’s standard mail function (not recommended).</li>
</ul>
</li>
<li>Providers: You can select a popular provider (Gmail, Outlook, SendGrid) to auto-fill the host and port fields.</li>
<li>SMTP Host, Port, and Encryption: Enter the details provided by your email service provider.</li>
<li>Authentication: In most cases, this toggle should be enabled.</li>
<li>SMTP Credentials: Enter the username (usually your email address) and password for your email account.
<ul>
<li>For Gmail/Google: If you have two-factor authentication enabled, you must create an “App Password” in your Google account’s security settings and use it here.</li>
</ul>
</li>
<li>Save Changes.</li>
</ol>
<h4>2. Sender Details</h4>
<ul>
<li>From Name: The name recipients will see.</li>
<li>From Email: The address emails will be sent from.</li>
<li>Force Sender: If enabled, all emails from your site (even from other plugins) will be sent using the specified From Name and From Email.</li>
</ul>
<h4>3. Telegram Notifications</h4>
<ol>
<li>Click the “Telegram Notifications” button.</li>
<li>Enable the “Enable Telegram Notifications” option.</li>
<li>Bot Token: Create a new bot by talking to <a href="https://t.me/botfather" rel="nofollow ugc"><code>@BotFather</code></a> on Telegram. It will provide you with a unique token. Paste it here.</li>
<li>Chat ID: Talk to the <a href="https://t.me/userinfobot" rel="nofollow ugc"><code>@userinfobot</code></a> and click “Start.” It will send you your unique ID. Paste it here.</li>
<li>Choose which events you want to be notified about (failed and/or successful sends).</li>
<li>Save the settings and click “Send Test” to verify.</li>
</ol>
<h3>Third-Party Services</h3>
This plugin uses the Telegram API to send notifications about the status of sent emails. This functionality is optional and only activated if you enable it in the settings and provide your own Telegram Bot Token and Chat ID.
<ul>
<li>Service: Telegram Bot API</li>
<li>Data Sent: When enabled, the plugin sends the recipient’s email address, email subject, your site’s URL, and the sending status (success or failure) to the Telegram API to be delivered to your specified chat.</li>
<li>Terms of Service: https://telegram.org/tos</li>
<li>Privacy Policy: https://telegram.org/privacy</li>
</ul>

Cherkasov SMTP Mailer

A reliable SMTP plugin for WordPress that ensures email delivery with logging and Telegram notifications.

Nicolas Verlhiac

<h3>Add Mail SMTP settings for WordPress</h3>
Looking to modify the SMTP on your WordPress site? 
Our Custom SMTP solution offers you this possibility, allowing you to easily change your WordPress SMTP settings, ensuring your emails consistently land in the recipient’s inbox.
Custom SMTP solves your email deliverability problems by reconfiguring WordPress to use a proper SMTP provider when sending emails.
What’s more, our intuitive settings page and comprehensive documentation will guide you through the process, making the task of modifying your SMTP settings easier than ever.
Custom SMTP is a free tool, packed with all the essential features you need to send your WordPress emails with absolute confidence!
<h3>Built-in Email Logging</h3>
Never wonder if your emails were sent again. Custom SMTP automatically logs every email sent from your WordPress site – including WooCommerce order notifications, contact form submissions, and password resets. Preview email content directly in wp-admin, debug delivery issues with detailed error messages, and export logs for compliance.
<h3>Configuration Options</h3>
You can set the following options:
<ul>
<li>From Name & Email – Specify the sender name and email address for all outgoing emails</li>
<li>SMTP Host – Your email provider’s server (e.g., smtp.gmail.com)</li>
<li>SMTP Port – Common ports: 587 (TLS), 465 (SSL), 25 (None)</li>
<li>Encryption – Choose between None, SSL, or TLS</li>
<li>Authentication – Enable/disable SMTP authentication for relay servers</li>
<li>Username & Password – Your SMTP credentials (password stored encrypted)</li>
<li>Provider Presets – One-click configuration for Gmail, Outlook, iCloud, SendGrid, AWS SES, and more</li>
</ul>
<h3>Key Features</h3>
SMTP Configuration 
* Configure any SMTP server (Gmail, Outlook, SendGrid, Mailgun, AWS SES, etc.) 
* Support for SSL/TLS encryption 
* Optional SMTP authentication for relay servers 
* Test connection without sending emails 
* Send test emails to verify configuration
Email Logging & Debugging 
* Zero configuration – Logging works out of the box 
* Track all emails sent from WordPress, WooCommerce, Contact Form 7, and any plugin 
* View delivery status (sent/failed) with detailed error messages 
* Debug wp_mail errors easily – See exactly why emails fail 
* Store email headers for advanced troubleshooting 
* Search by recipient, subject, or status 
* Filter by date range (Today, 7 days, 30 days) 
* Export logs to CSV for reporting and compliance
Email Preview & Content 
* Preview email body directly from wp-admin – No need to send test emails 
* View HTML source code of any logged email 
* Outlook-style sidebar for quick preview 
* Download any email as HTML file for archiving 
* Optional content storage (disabled by default for privacy)
Security 
* SMTP password encrypted in database (AES-256-CBC) 
* All admin actions protected with nonces 
* Capability checks on all operations

Custom SMTP: Email Deliverability – FREE & Easy-to-use

Effortlessly configure WordPress SMTP and monitor all sent emails. Built-in email logging with preview, error debugging, and WooCommerce support.

Cherkasov SMTP Mailer vs Custom SMTP: Email Deliverability – FREE & Easy-to-use