Pinny’s Simple SMTP – Lightweight SMTP Mailer vs Post SMTP – Complete

Pinny’s Simple SMTP is a ultra lightweight SMTP plugin weighing in at just 4KB. It’s simple to use, highly secure, and includes all the basic features you need to send emails reliably. 🚀 Super Easy 30-Second Configuration Tired of bloated setup wizards, “Connect Account” popups, and endless menus? Pinny’s Simple SMTP is designed to be invisible. We removed the fluff so you can get back to work. 1. Enter your Host & Port. 2. Enter your Login. 3. Click Save. That’s it. You are done. There is no complex UI to learn. No dashboards to manage. It is a true “Set and Forget” solution that just works. Unlike most SMTP plugins (which are typically 2MB+ in size), Pinny’s Simple SMTP is ultra-lightweight, easy to set up, and never compromises on security. We ensure your sensitive credentials are always protected with automatic encryption—no more storing passwords in plain text. This plugin is different. It’s smaller than a favicon, works with any mail provider, and takes just seconds to set up. Features: Ultra Lightweight (4KB): This is the a ultra lightweight SMTP plugin. It has zero impact on your site speed. Encrypted Security: We take security seriously. Your SMTP password is encrypted in the database using native WordPress salts. We never store credentials in plain text. Dead Easy Setup: No confusing wizards or tutorials needed. Just enter your Host, Port, and Login, then click Save. All Basic Features: Supports TLS/SSL, custom ports, “From” email/name overrides, and includes a 1-Click Test Email tool. Zero Bloat: No ads, no dashboard widgets, no usage tracking, and no upsells. wp-config Configuration Mode: For added security, define SMTP settings in wp-config.php and lock the admin UI. ⚙️ Advanced: Configure SMTP via wp-config.php Pinny’s Simple SMTP supports configuration directly from wp-config.php, allowing administrators and developers to lock SMTP settings and prevent changes from the WordPress dashboard. When enabled, the plugin automatically switches the admin interface to read-only mode. To enable this mode, add the following constants to your wp-config.php file define('PINNYS_SMTP_FORCE', true); define('PINNYS_SMTP_ENABLED', true); define('PINNYS_SMTP_HOST', 'smtp.gmail.com'); define('PINNYS_SMTP_PORT', 587); define('PINNYS_SMTP_ENCRYPTION', 'tls'); define('PINNYS_SMTP_AUTH', true); define('PINNYS_SMTP_USERNAME', '[email protected]'); define('PINNYS_SMTP_PASSWORD', 'your_app_password'); define('PINNYS_SMTP_FROM_EMAIL', '[email protected]'); define('PINNYS_SMTP_FROM_NAME', 'Your Website'); Once PINNYS_SMTP_FORCE is enabled: SMTP settings are loaded from wp-config.php The WordPress settings page becomes read-only Dashboard changes cannot override your configuration Note: If PINNYS_SMTP_FORCE is not defined, the plugin behaves normally and settings can be configured from the WordPress dashboard. 🛡️ The “Zero-Retention” Security Promise Pinny’s Simple SMTP is built on a strict security philosophy: WordPress is a CMS, not an Email Archive. Most SMTP plugins log every email sent from your site into your WordPress database. While this seems convenient, it introduces massive security risks, database bloat, and privacy violations. We feature a Zero-Retention Architecture. We connect, deliver, and vanish. Here is why this is safer for you: 1. The Security Risk (Why we don’t log) Storing email logs in your database creates a high-value target for hackers. The “Big Hack” Reality: In 2024 and 2025, major SMTP plugins (such as Post SMTP) suffered critical vulnerabilities (CVE-2023-6875 and CVE-2025-11833). Hackers were able to bypass authentication, trigger password reset emails, read the plugin’s email logs to capture the reset link, and take over the entire website. Our Fix: You cannot steal what isn’t there. By not logging emails, Pinny’s Simple SMTP renders this entire class of “Account Takeover” attacks impossible. 2. The Database & Privacy Problem Bloat: Transactional logs grow indefinitely. A busy store sends thousands of emails a month. Storing these in wp_options or custom tables slows down your site and bloats your backups. GDPR & Privacy: Your database should not permanently store customer PII (Personally Identifiable Information) like password reset links, purchase receipts, or private contact form messages. If your site is compromised, those logs are a leak waiting to happen. 3. The Right Way to Log If you need to track email delivery, do it where it belongs: At your Email Provider. Gmail / Google Workspace: Has a “Sent” folder and comprehensive audit logs. SendGrid / Mailgun / SES: These services are built to archive millions of emails securely, with proper rotation policies and access controls. Microsoft / Outlook: Native “Sent Items” retention. Pinny’s Simple SMTP keeps your WordPress database clean, fast, and secure by letting your email provider do its job. 🚫 The “Anti-Bloat” Architecture: Why We Rejected OAuth Pinny’s Simple SMTP is built on a strict performance philosophy: Do not load code you do not use. The industry standard is to force users into OAuth (Log in with Google/Microsoft). While this looks fancy, for a WordPress plugin, it is technically inferior to standard SMTP. Here is why we deliberately stripped OAuth out of Pinny’s: 1. The “Universal Adapter” Trap (Bloat) Most users connect to one provider (e.g., just Gmail). However, to support OAuth, other plugins must bundle massive SDK libraries for 10–15 different services (Google, Microsoft, Amazon, Yahoo, Zoho, etc.). The Result: You install megabytes of vendor code just to send a simple email. Our Fix: Pinny’s uses standard SMTP. We don’t force you to host 14 unused API libraries on your server just to use the 15th. This keeps our codebase at ~4KB. 2. The Complexity Risk (Security) In security, Complexity is the Enemy. OAuth flows require redirects, token storage, refresh tokens, and constant API updates. Every external library added to a plugin increases the “Attack Surface”—more code means more places for bugs to hide. The Reality: If a plugin’s bundled “Google API Client” has a vulnerability, your site is at risk—even if you are using Outlook. Our Fix: We use native WordPress functions. No external dependencies. No third-party SDKs. No supply-chain vulnerabilities. 3. The Reality of “Shared OAuth Infrastructure” Many plugins advertise “one-click OAuth login” for Gmail or Microsoft 365. To provide this convenience without requiring users to create their own developer credentials, these plugins typically authenticate through a shared OAuth application (Client ID and Secret) owned by the plugin developer. This creates several potential risks including: Shared API rate limits OAuth quotas apply to the shared application, not your individual site. Abuse impact If other sites using the same OAuth application send spam or violate provider policies, the provider may restrict or flag the application, potentially affecting all connected users. Application suspension When the shared OAuth application is disabled or restricted by the provider, authentication will fail for every site using it. Developer infrastructure dependency Some plugins route OAuth authentication through servers operated by the plugin developer. If that infrastructure experiences downtime, users may be unable to connect accounts or refresh authentication tokens. Maintenance risk OAuth integrations require ongoing API updates. If a plugin is abandoned and the OAuth application is not maintained, authentication may eventually stop working. Pinny’s Simple SMTP avoids these dependencies entirely by using direct SMTP authentication, allowing your site to communicate directly with your mail server without shared OAuth infrastructure. 4. App Passwords: The Superior Choice We use App Passwords (Standard SMTP Authentication). This is the secure, recommended method for server-side mailing (Gmail/Workspace & Microsoft 365). Strictly Scoped: An App Password usually only has permission to send mail. Unlike an OAuth token (which can sometimes be scoped too broadly), an App Password cannot be used to change your account settings or read your Drive files. Instantly Revocable: If you suspect a breach, you can revoke that specific App Password instantly from your Google/Microsoft dashboard without changing your main login credentials. Zero Downtime: OAuth tokens expire or disconnect if the API changes. App Passwords work until you say stop. Pinny’s Simple SMTP chooses stability over shiny buttons. Enter your Host, Port, and App Password → Save. Done.

👑 Go Pro | 💻Live Demo | 🔌Extensions | 📱Mobile Application WordPress Mail SMTP Plugin Are you facing the WordPress not sending emails issue❓Don’t worry! Install the Post SMTP Plugin aka (WordPress mail SMTP plugin), for smooth WordPress email deliverability. Over 400,000 website owners use Post SMTP daily to send WordPress emails securely and reliably💯 using Gmail SMTP, Microsoft Office 365/Outlook, and other SMTP integrations. Post SMTP is a free, next-generation WordPress SMTP plugin that improves email deliverability for your WordPress site. The best part is that to ensure high email deliverability the Post SMTP plugin offers 15+ SMTP mailer options, including Gmail, Brevo, Microsoft 365 SMTP (formerly Office 365), Amazon SES, Zoho Mail, Postmark, Mailgun, SendGrid, etc. With the ✨Post SMTP Pro version✨, you can unlock even more advanced features, such as detailed email logs, email delivery stats and reporting, email open-tracking, premium SMTP integration (Microsoft 365, Amazon SES, and Zoho Mail SMTP), multiple options for email alerts (i.e., Teams, Webhook, Twilio, and Slack), and much more. What is SMTP, and Why Do You Need It? SMTP, short for Simple Mail Transfer Protocol, is the most widely used protocol for online email transmission. SMTP configuration with proper authentication for your WordPress site ensures that your WordPress emails do not end up in spam. By default, WordPress sends emails using the PHP mail function, which isn’t ideal because most WordPress hosting servers don’t support PHP email. On top of that, most email clients, such as Outlook (Office 365 / Microsoft365), Yahoo, Gmail, Brevo, Zoho, Amazon SES, Mailgun, etc., automatically block or mark spam emails that lack proper authentication. That’s why you need to install the Post SMTP plugin on your WordPress site to configure the SMTP mailer of your choice with one-click SMTP setup for Gmail, Microsoft 365, and more. How Does Post SMTP Work? Post SMTP allows you to easily replace the default PHP mail function (wp_mail) of your WordPress site with the SMTP mailer of your choice, like Microsoft 365(Office 365), Brevo, Zoho, SendGrid, Mailgun SMTP, Gmail (Gmail SMTP Server), Post Mark, Amazon SES etc., which in turn improves WordPress email deliverability. This WordPress mail SMTP plugin provides detailed email logs, email open tracking, email alerts, and a mobile app to monitor WordPress email deliverability. Additionally, with a 3-step setup wizard you can configure any SMTP mailer (e.g., Gmail SMTP (Gmail one-click setup), Microsoft Office 365, Mailgun, Brevo, etc.) securely via API Keys in seconds without providing your SMTP account credentials. NOTE: If you want to set up a Gmail SMTP server for WordPress, check out our detailed guide on how to configure Gmail SMTP server to send WordPress emails reliably. Ultimately, this WordPress SMTP plugin helps you fix all your issues related to WordPress not sending emails. ⚡ Features That Make Post SMTP Stand Out ✅ Quick Setup Wizard: Easy-to-use and powerful 3-Step Setup Wizard for quick WordPress SMTP configuration with One-click SMTP setup for Gmail SMTP and Microsoft 365 SMTP. ✅ SPF, DKIM & DMARC Checks: Keep an eye on domain’s reputation with out built-in Spam Score Checker that looks at your DNS records.. ✅ Detailed Email Logs: Quickly view, filter, and check the status of all your WordPress emails and error messages with a simple click, ensuring your email logs are always up to date. ✅ Post SMTP Mobile App: Get WordPress email alerts directly on your mobile phone so you can track email deliverability on the go. ✅ Extensive Email Reporting: Get a thorough report at a glance regarding your WordPress email deliverability performance, including email open tracking and other important stats. ✅ Resend Email Attachments [PRO]: With a single click, you can resend any email attachment right through your email log screen, maintaining a seamless record in your email logs. ✅ OAuth 2.0 Support: Authenticate all major SMTP service providers’ accounts (i.e., Microsoft Office 365/Microsoft365, Brevo, Gmail SMTP (Gmail one-click setup), Amazon SES, SendGrid, Mailgun, etc.) securely using APIs. ✅ Fallback Mailing: Easily set up a backup WordPress SMTP mailer to send any transactional email in case of a failure with the main mailer. ✅ Instant Failure Notification: In case of any WordPress email delivery failure, you’ll get an instant email alert, Slack notification, SMS (via Twilio), push notification (via webhook and Chrome Extension), etc. ✅ Free Chrome Extension:Receive all your WordPress email alerts for failed email deliveries directly into your Chrome browser window. ✅ Weekly Email Summary: Get a snapshot of your WordPress email deliverability report right in your inbox every week, which reveals the total number of emails, the number of failed emails, total successful email deliveries, and your recent email logs. ✅ Unparalleled Customer Support: We offer multiple support options, including email, a WordPress forum, and even one-on-one expert assistance for WordPress SMTP Configuration and all your email delivery issues. ⚡ Post SMTP Mobile App: Get an Instant Pulse of Your WordPress Emails ✅ Keep track of Your Emails: You can monitor all the emails sent from your WordPress site and check the status of each email. ✅ Get Instant Alerts: When an email fails to deliver, you will receive an instant notification on your phone. ✅ Resend Failed Emails [PRO]: With one tap on your app, you can resend any failed email. Preview Any Email: You can preview your emails and see how it looks. ✅ Connect Multiple Sites [PRO]: Monitor email logs and get email failure notifications (email alerts) for all your WordPress sites right from the app. ✅ Troubleshoot Errors: Quickly fix email failure issues by viewing the error details with a single tap. SMTP Mailer Options for Post SMTP With Post SMTP, you get many SMTP mailer options, such as: Sweego SMTP – Newly Added Mailtrap SMTP – Newly Added Emailit SMTP Resend SMTP MailerSend SMTP Brevo (formerly Sendinblue) SMTP Microsoft 365 SMTP (Formerly Office 365 and Outlook) Gmail SMTP (Gmail API, G Suite, Google Workspace) Amazon SES SMTP Zoho Mail SMTP Mandrill SMTP Mailgun SMTP SendGrid SMTP Mailjet SMTP SparkPost SMTP Postmark SMTP Elastic Email SMTP Other SMTP (To connect any SMTP server) You often need to install a different WordPress mail smtp plugin for each SMTP mailer setup. However, with Post SMTP, you can set up all popular SMTP providers, such as Gmail one-click setup, Microsoft Office 365, Mailgun, Amazon SES, Zoho Mail, etc. Microsoft 365 SMTP Millions of businesses around the world use Microsoft 365 (formerly Office 365) or Outlook for their email communications. With Post SMTP Pro, you can easily connect your existing Outlook or Microsoft 365 (formerly Office365) account with WordPress via one-click SMTP setup to improve email deliverability. 👉 For more details, check out our guide on how to set up Microsoft 365 for WordPress emails. Amazon SES SMTP Amazon SES (Simple Email Service) is a cloud-based email service that can send transactional and mass emails. SES is cost-effective, reliable, and scalable. Using the Post SMTP Pro, you can securely integrate your Amazon SES account with WordPress via APIs so that you can send large numbers of emails on a budget. 👉 For more details, check out our Amazon SES documentation. Zoho Mail SMTP Connect your Zoho mail personal or business account with WordPress via Post SMTP Pro to improve email deliverability. It has a 99.9% server uptime and offers a free option. 👉 For more details, check out our Zoho Mail documentation. 👉 To learn about all the supported SMTP mailers, check out our Complete SMTP Mailer Guide. ⚡ Added Benefits of Getting Post SMTP Pro The Post SMTP Pro gives you an edge that makes your WordPress email management and performance reporting a breeze! With Post SMTP Pro, you get the following additional perks: ✅ Microsoft 365 One-Click: Upgrade to unlock a smooth and effortless Microsoft email setup. Just enable Microsoft 365 One-Click Setup. With a single toggle, Post SMTP automatically configures everything needed for secure and reliable Outlook / Office 365 email delivery no manual settings required, no technical steps to worry about. ✅ Google (Gmail) SMTP One-Click: Upgrade now for a worry-free Gmail SMTP integration. Activate Gmail One-Click Setup and let Post SMTP Setup Wizard handle all the API-related technicalities. ✅ Microsoft Teams Notifications: This WordPress SMTP plugin enables you to receive real-time notifications for your emails on Microsoft Teams with a simple webhook. ✅ Native SMTP Integration: You can use this WordPress SMTP plugin to securely configure 15+ SMTP service provider accounts, such as Microsoft 365 (Microsoft Office 365), Gmail SMTP, Amazon SES, Zoho Mail, Mailgun, Postmark, etc., with WordPress using APIs. ✅ Twilio (SMS) With this WordPress SMTP plugin, you can easily configure and receive all your WordPress email failure alerts through SMS by connecting your Twilio account. ✅ Secondary SMTP Connection: Using the Post SMTP Pro, you can set up multiple SMTP mailers so that for any reason, whenever an email fails to deliver, Post SMTP will automatically route that email through the secondary SMTP connection. In turn, this will improve your email delivery rate. ✅ Weekly Email Health Report: As a Post SMTP Pro member, you get a weekly email report that reveals all your deliverability statistics at a glance, such as the total number of emails sent from your WordPress site, the number of failed emails, the total number of successful email deliveries, and the complete email logs report so you can identify any issues right away without login into your WordPress. ✅ Email Open Tracking: Are you curious about which of your emails get opened? With Post SMTP Pro, you can easily view email open tracking right on your email log screen, which greatly enhances your ability to analyze the performance of your WordPress emails. ✅ Auto Resend Failed Emails: With Post SMTP Pro, you can effortlessly increase your WordPress email delivery success rate by simply specifying the number of resubmission attempts after the first failed submission. ✅ Email Batching and Quota Scheduling: Avoid any spam detection and daily email limit exceeding issues with the Post SMTP email batching and quota scheduling feature. As a pro user, you can easily specify the duration and number of emails per batch and choose how often to send the emails (hourly, daily, weekly, or monthly) for optimal email delivery. ✅ Priority Support: We offer exceptional customer support to all the Post SMTP Pro users. You can access our team of WordPress experts on one-on-one email support 24/7 for any WordPress email-related issue. Also, we offer WordPress SMTP Configuration service on demand. 🆕 MainWP Post SMTP Extension – NEW Manage WordPress SMTP Configuration Across All Your Sites From A Single Dashboard With MainWP Post SMTP Extension, you can: Set up and sync your SMTP settings for all your sites with one click. Ensure email deliverability with backup SMTP connections. Receive instant email failure alerts via email webhook, Slack, SMS, and Microsoft Teams. Track and resend your WordPress emails with a dedicated mobile app Access detailed email logs of all your sites in one place MainWP Post SMTP Extension is the ultimate solution for WordPress email management. Get it today and enjoy the benefits of easy and efficient WP SMTP management.🙃 ⛑ Need Help? Get Expert Assistance on Demand!!! With our Expert Assistance, you can get help with email deliverability and SMTP plugin configuration for Gmail, Microsoft Office 365, and any SMTP setup for WordPress. All you need is to click here, fill out the form, sit back, and relax while our WordPress expert sets up your SMTP configuration. Also, you can request us to configure all your DNS records for proper email authentication. In short, our Expert Assistance is your one-stop destination for all your WordPress email delivery issues. Compatibility and Support Contact Form 7 Woocommerce New User Approve Password Protected Elementor Forms Gravity Forms Login Designer Visual Forms Builder Mailster Newsletter plugin SendPress Newsletters WP HTML Mail Email Templates .. and every other plugin that uses the WordPress API wp_mail to send mail! Try Our Other Awesome WordPress Plugins Gutena Forms – Create modern, responsive contact forms directly in the Gutenberg block editor. Add advanced fields, protect against spam with reCAPTCHA and Cloudflare Turnstile, manage form entries, and more. Password Protected – Secure your WordPress site, posts, pages, and categories with simple password protection. 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WPExperts WooCommerce Store – Explore premium WooCommerce plugins and professional solutions by WPExperts.== Requirements == WordPress v6.2 and above is recommended PHP v7.6 and above is recommended. Memory should be at least 800KiB per processing at idle. Ensure your email service provider allows SMTP connection through 3rd party applications, if not you can have it enabled.(Other SMTP) For reliable email deliverability, valid credentials are required.