Denys Cherkasov

<p>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.</p>
<p><strong>Cherkasov SMTP Mailer</strong> 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.</p>
<p>The plugin features a modern, intuitive interface, an advanced email log, and the ability to receive instant notifications about sending statuses in your Telegram.</p>
<h3>Features</h3>
<ul>
<li><strong>Reliable Delivery:</strong> Send emails through any SMTP server to avoid spam filters.</li>
<li><strong>Easy Configuration:</strong> Quick presets for popular services (Gmail, Outlook, SendGrid) and flexible options for any other SMTP provider.</li>
<li><strong>Email Log:</strong> Keeps a detailed log of all sent emails. View content, status, headers, and error messages.</li>
<li><strong>Log Management:</strong> Search for emails, resend failed messages (one by one or all at once), and delete entries.</li>
<li><strong>Telegram Notifications:</strong> Get instant messages in Telegram about successfully sent or failed emails.</li>
<li><strong>Testing Tool:</strong> A built-in feature to send a test email to verify your settings and see a detailed debug log.</li>
<li><strong>Security:</strong> Passwords and tokens are not displayed in the form after being saved and are transmitted securely.</li>
<li><strong>Modern UI:</strong> A clean, responsive, and user-friendly interface built with modern web technologies.</li>
<li><strong>Retention Policies:</strong> Configure automatic deletion of old log entries to keep your database clean.</li>
</ul>
<h3>Configuration</h3>
<p>After activating the plugin, go to <strong>Settings > Cherkasov SMTP Mailer</strong>.</p>
<h4>1. Main SMTP Settings</h4>
<ol>
<li><strong>Mailer:</strong>
<ul>
<li><strong>SMTP:</strong> Choose this option to send emails via an external server.</li>
<li><strong>Default WP Mailer:</strong> Use your host’s standard mail function (not recommended).</li>
</ul>
</li>
<li><strong>Providers:</strong> You can select a popular provider (Gmail, Outlook, SendGrid) to auto-fill the host and port fields.</li>
<li><strong>SMTP Host, Port, and Encryption:</strong> Enter the details provided by your email service provider.</li>
<li><strong>Authentication:</strong> In most cases, this toggle should be enabled.</li>
<li><strong>SMTP Credentials:</strong> Enter the username (usually your email address) and password for your email account.
<ul>
<li><strong>For Gmail/Google:</strong> 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><strong>Save Changes.</strong></li>
</ol>
<h4>2. Sender Details</h4>
<ul>
<li><strong>From Name:</strong> The name recipients will see.</li>
<li><strong>From Email:</strong> The address emails will be sent from.</li>
<li><strong>Force Sender:</strong> 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><strong>Bot Token:</strong> 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><strong>Chat ID:</strong> 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>
<p>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.</p>
<ul>
<li><strong>Service:</strong> Telegram Bot API</li>
<li><strong>Data Sent:</strong> 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><strong>Terms of Service:</strong> https://telegram.org/tos</li>
<li><strong>Privacy Policy:</strong> https://telegram.org/privacy</li>
</ul>


Cherkasov SMTP Mailer

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

Jeffrey Schutzman

<p>Send mail using SMTP without exceeding the the rate allowed by your mail provider(s). Mail can be sent using multiple<br />
user logins/passwords to give fault tolerance and make each mail message somewhat unique so that it is less likely to<br />
be flagged as SPAM/UCE by either your or the downstream mail providers.  Messages can be automatically resent when<br />
the plugin detects Non-delivery messages (NDRs) returned from mail sent by the plugin.</p>
<p>Email can be throttled per outbound SMTP account.  Limits can be set for maximum number of recipients per hour and per day.</p>
<h4>Features</h4>
<ul>
<li>Sends mail via SMTP </li>
<li>Send mail no faster than the configured number of recipients per hour and day.  Keeps you in complience with your providers email sending limits.</li>
<li>Configure multiple SMTP accounts to use for sending messages (Gmail, MSN, Go-daddy, etc)</li>
<li>Process non-delivery messages and automatically resend messages</li>
<li>Keep record of sent mail messages so that you can prove to your provider you didn’t send SPAM</li>
<li>Automatically stops sending email when errors encountered, auotmatically restarts after configured period of time </li>
<li>Mail sending statistics display</li>
</ul>
<h4>Benefits</h4>
<ul>
<li>Using multiple email accounts makes it less likely that your email will be incorrectly flagged as SPAM by downstream providers </li>
<li>Use in combination with other email newsletter, sending and formatting WordPress plug-ins </li>
<li>Reduces non-delivered mail due to invalid SPAM flagging or exceeding near or downstream provider sending/receiving limits  </li>
</ul>
<p>More information can be found on our <a href="http://www.pyebrook.com/mail-queues" rel="nofollow ugc">web site</a>.</p>
<h3>Notes</h3>
<h4>Non-Delivery Processing</h4>
<p>Non-Delivery (NDR) messaging processing note: plugin should recognize common non-delivery formats.  But, because non-deliveries are free form, and can be highly customized or specifically localized the plugin may not recognize the message.  If you provide a sample non-delivery message we can make the plug-in a little smarter.</p>


Mail Queues by PBCI

Queue, Throttle, Send SMTP email through multiple providers.  Automatic re-send when non-delivery received.

Cherkasov SMTP Mailer vs Mail Queues by PBCI