Frumbik SMTP vs MailerPress – Newsletter, email marketing & AI automation

WordPress uses the PHP mail() function by default, which often results in emails being marked as spam or not delivered at all. Frumbik SMTP replaces the default mail function with authenticated SMTP or API-based email delivery through your chosen provider. Connect Gmail, SendGrid, Amazon SES, or any SMTP server — and all emails WordPress sends will be properly authenticated, encrypted, and delivered. Key Features Frumbik SMTP provides the following capabilities, all included in the free version: 🔄 Automatic Failover — If your primary provider goes down, emails automatically route to your backup provider. 📊 Dashboard — Real-time delivery stats, success rates, and charts. See what is happening with your emails at a glance. 📋 Complete Email Log — Every email logged with status, timestamps, headers, and source plugin. Search, filter, resend, or export — all from one screen. 🔐 Strong Security — AES-256-CBC encryption for all credentials. Security scoring dashboard with actionable recommendations. ⚡ Background Queue — High-traffic site? Queue emails for async delivery so your pages load fast while emails send in the background. 🎯 Smart Routing — Route WooCommerce emails through SendGrid, contact forms through Mailgun, and newsletters through Amazon SES — all automatically. 9 Providers, One Plugin Connect to any email service without installing separate add-ons: Other SMTP — Any SMTP server (Gmail, Outlook, Yahoo, your hosting, custom servers) SendGrid — Transactional email API by Twilio Mailgun — Email API by Sinch Postmark — Transactional email delivery by ActiveCampaign Brevo (formerly Sendinblue) — Marketing and transactional email SparkPost — Email delivery by MessageBird Amazon SES — AWS Simple Email Service (v2 API with Signature v4) Microsoft 365 / Outlook — Microsoft Graph API with OAuth 2.0 Gmail API — Google Gmail API with OAuth 2.0 All providers are included in the plugin. Core Features 📨 Reliable Email Delivery Replace WordPress’s unreliable wp_mail() with authenticated SMTP or native API connections Supports TLS and SSL encryption protocols Proper SPF, DKIM, and DMARC alignment through your provider Works with any WordPress theme, plugin, or page builder 📋 Comprehensive Email Logging Every outgoing email logged automatically — sent, failed, or queued Full details: recipients, subject, body, headers, attachments, timestamps Automatic source detection — know which plugin triggered each email One-click resend for failed or bounced emails CSV export with advanced search and filtering Configurable log retention (auto-cleanup old logs) 🔄 Multi-Connection & Failover Configure multiple mail providers simultaneously Automatic failover — if Provider A fails, Provider B takes over instantly No manual intervention needed. No lost emails during outages. Connection health monitoring with success rate tracking 🎯 Smart Routing Rules Route emails to different providers based on conditions: Recipient email address or domain Email subject containing specific keywords The WordPress plugin that triggered the email Example: WooCommerce orders → SendGrid, contact forms → Mailgun Priority ordering with drag-free interface ⚡ Email Queue (Async Sending) Queue emails for background delivery via WP-Cron Pages load faster — no waiting for SMTP connections during page loads Failed emails automatically retried with exponential backoff Configurable batch size and retry limits Real-time queue dashboard with cancel/retry controls 🔔 Failure Notifications Get alerted instantly when emails fail to send 4 notification channels: Email, Slack, Discord, Telegram Per-event subscription — choose exactly which events trigger alerts Notification history with delivery status tracking 🔐 Security AES-256-CBC encryption for all stored credentials (passwords, API keys, OAuth tokens) Security Score Dashboard — real-time security posture with actionable fix recommendations Dedicated encryption key support via wp-config.php Rate limiting on all REST API endpoints Six custom WordPress capabilities for role-based access control Full audit log tracking every configuration change CSRF protection, nonce verification, input sanitization throughout 🧙 Setup Wizard Guided 7-step wizard for first-time configuration Automatic import from WP Mail SMTP, Post SMTP, Fluent SMTP, and Easy WP SMTP Provider presets with pre-filled configuration fields Built-in connection test with real-time feedback 🛠️ Import / Export & Tools Export your complete configuration as a JSON file (settings, connections, routing rules) Import on another site to replicate your setup instantly Debug Info page with system diagnostics for troubleshooting Multisite-compatible import/export 🖥️ Modern Admin Interface React-powered single-page application — fast and responsive Real-time dashboard with delivery charts and statistics Responsive design for desktop, tablet, and mobile Built with WordPress accessibility standards (WCAG 2.1) Full internationalization support (i18n-ready) 🌐 Multisite Ready Full WordPress Multisite support out of the box Network-wide or per-site configuration Network admin management panel Settings propagation across all network sites For Developers Hooks & Filters — 30+ action and filter hooks for complete customization IoC Container — Laravel-inspired dependency injection container PSR-4 Autoloading — Clean, namespaced codebase via Composer REST API — Full REST API for headless or programmatic management Extensible Providers — Add custom mail providers by implementing MailProviderInterface Strategy Pattern — Clean architecture with strategy, repository, and service provider patterns External services This plugin connects to third-party email delivery services and notification platforms to send emails and alerts on your behalf. No data is sent to any service unless you explicitly configure and enable that provider or notification channel in the plugin settings. Gmail API (Google) When configured as a mail provider, this plugin connects to the Gmail API to send emails using your Google account via OAuth 2.0. Endpoints: https://gmail.googleapis.com, https://accounts.google.com, https://oauth2.googleapis.com Data sent: email content (recipients, subject, body, headers, attachments), OAuth tokens for authentication When: each time WordPress sends an email through this provider, and during OAuth authentication Google Privacy Policy Google Terms of Service Microsoft 365 / Outlook (Microsoft Graph API) When configured as a mail provider, this plugin connects to the Microsoft Graph API to send emails using your Microsoft 365 or Outlook account via OAuth 2.0. Endpoints: https://graph.microsoft.com, https://login.microsoftonline.com Data sent: email content (recipients, subject, body, headers, attachments), OAuth tokens for authentication When: each time WordPress sends an email through this provider, and during OAuth authentication Microsoft Privacy Statement Microsoft Services Agreement SendGrid (Twilio) When configured as a mail provider, this plugin sends emails through the SendGrid API. Endpoint: https://api.sendgrid.com/v3 Data sent: email content (recipients, subject, body, headers, attachments), API key for authentication When: each time WordPress sends an email through this provider Twilio Privacy Policy Twilio Terms of Service Mailgun (Sinch) When configured as a mail provider, this plugin sends emails through the Mailgun API. Endpoints: https://api.mailgun.net/v3 (US region) or https://api.eu.mailgun.net/v3 (EU region) Data sent: email content (recipients, subject, body, headers, attachments), API key for authentication When: each time WordPress sends an email through this provider Mailgun Privacy Policy Mailgun Terms of Service Brevo (formerly Sendinblue) When configured as a mail provider, this plugin sends emails through the Brevo API. Endpoint: https://api.brevo.com/v3 Data sent: email content (recipients, subject, body, headers, attachments), API key for authentication When: each time WordPress sends an email through this provider Brevo Privacy Policy Brevo Terms of Use SparkPost (MessageBird) When configured as a mail provider, this plugin sends emails through the SparkPost API. Endpoints: https://api.sparkpost.com/api/v1 (US) or https://api.eu.sparkpost.com/api/v1 (EU) Data sent: email content (recipients, subject, body, headers, attachments), API key for authentication When: each time WordPress sends an email through this provider SparkPost Privacy Policy SparkPost Terms of Use Postmark (ActiveCampaign) When configured as a mail provider, this plugin sends emails through the Postmark API. Endpoint: https://api.postmarkapp.com Data sent: email content (recipients, subject, body, headers, attachments), server API token for authentication When: each time WordPress sends an email through this provider Postmark Privacy Policy Postmark Terms of Service Amazon SES (Amazon Web Services) When configured as a mail provider, this plugin sends emails through the Amazon SES v2 API using AWS Signature v4 authentication. Endpoint: https://email.{region}.amazonaws.com (region depends on your configuration) Data sent: email content (recipients, subject, body, headers, attachments), signed with AWS access key credentials When: each time WordPress sends an email through this provider AWS Privacy Notice AWS Service Terms Telegram Bot API When configured as a notification channel, this plugin sends failure alerts to a Telegram chat using the Telegram Bot API. Endpoint: https://api.telegram.org/bot{token}/sendMessage Data sent: notification messages containing email failure details (recipient, subject, error message, timestamp) When: each time a configured notification event occurs (e.g., email delivery failure) Telegram Privacy Policy Telegram Terms of Service Slack When configured as a notification channel, this plugin sends failure alerts to a Slack channel using incoming webhooks. Endpoint: user-configured Slack webhook URL (https://hooks.slack.com/services/...) Data sent: notification messages containing email failure details (recipient, subject, error message, timestamp) When: each time a configured notification event occurs (e.g., email delivery failure) Slack Privacy Policy Slack Terms of Service Discord When configured as a notification channel, this plugin sends failure alerts to a Discord channel using webhooks. Endpoint: user-configured Discord webhook URL (https://discord.com/api/webhooks/...) Data sent: notification messages containing email failure details (recipient, subject, error message, timestamp) When: each time a configured notification event occurs (e.g., email delivery failure) Discord Privacy Policy Discord Terms of Service

MailerPress is a free email marketing and newsletter plugin for WordPress. Build professional email campaigns with a drag-and-drop editor, manage unlimited subscribers and lists, schedule newsletters, and send automated emails — all from your WordPress dashboard. Whether you’re a blogger sending a weekly newsletter, an online store owner looking to customize WooCommerce emails (paid plan required), or a marketer running large-scale email campaigns, MailerPress gives you everything you need — with no subscriber limits and no sending restrictions. Drag-and-Drop Email Editor Create beautiful email newsletters without writing a single line of code. The MailerPress email editor is inspired by the WordPress Block Editor (Gutenberg), so it feels instantly familiar: Drag-and-drop blocks to build your email layout Pre-built email templates to get started in seconds Save and reuse your own custom layouts Full theme.json support for consistent branding with Full Site Editing Google Fonts integration with local hosting for fast loading MJML template import for advanced email designs Responsive emails that look great on every device Subscriber Management & List Building Grow your email list with powerful subscriber management tools, completely free: Unlimited subscribers, lists, and tags — no restrictions Customizable opt-in forms with shortcode — works with any page builder (Elementor, Bricks, Divi, and more) Gutenberg opt-in form block for the Block Editor Embeddable opt-in forms for external websites Double opt-in with customizable confirmation emails CSV import and export for easy subscriber migration Advanced subscriber segmentation GDPR-compliant subscription management with built-in unsubscribe Email Campaigns & Newsletter Scheduling Send newsletters and email campaigns on your schedule: Create and send email campaigns to your subscriber lists Schedule newsletters for future delivery Merge tags for personalized email content (subscriber name, custom fields, and more) Content retrieval from posts and pages Flexible click and open tracking (track, anonymize, or disable) Detailed campaign analytics and performance reports Email Automation Automate your email marketing to save time and boost engagement: Automated post notification emails when you publish new content Scheduled email campaigns with precise timing Automated double opt-in confirmation follow-ups (paid plan required) Advanced automation workflows with triggers and conditions (paid plan required) WooCommerce Email Marketing (paid plan required) Turn your WooCommerce store into an email marketing machine: Design custom WooCommerce transactional emails with the drag-and-drop editor Override default WooCommerce order confirmation, shipping, and account emails Send promotional email campaigns to your customers Retrieve WooCommerce product content directly in your newsletters Segment subscribers based on purchase behavior Incoming & Outgoing Webhooks Connect MailerPress to any external system: Incoming webhooks to add subscribers from external platforms Outgoing webhooks to send real-time events to third-party services Build custom integrations with your existing tools Email Sending Options Send emails using your preferred method: PHP Mail (default — works out of the box) Custom SMTP configuration SendGrid integration (paid plan required) Brevo / Sendinblue integration (paid plan required) Mailjet integration (paid plan required) Amazon SES integration (paid plan required) Mailgun integration (paid plan required) Postmark integration (paid plan required) Bounce management via email provider APIs (paid plan required) All Free Features Drag-and-drop email editor inspired by WordPress Block Editor Unlimited subscribers, lists, tags, and campaigns Email newsletter creation and scheduling Customizable opt-in forms (shortcode + Gutenberg block) Double opt-in with confirmation emails CSV import/export for subscriber migration Subscriber segmentation Email campaign analytics Post and page content retrieval for newsletters Incoming and outgoing webhooks Click and open tracking (with anonymous option) Merge tags for email personalization MJML template import Google Fonts with local hosting GDPR-compliant with built-in unsubscribe Self-hosted — your data stays on your server Full theme.json and FSE support Hundreds of developer hooks and filters REST API for custom integrations Paid Plan Features Upgrade to MailerPress for advanced email marketing capabilities: WooCommerce email customization — design and override transactional emails (order confirmation, shipping, account emails) with the drag-and-drop editor Professional email delivery — SendGrid, Brevo, Mailjet, Amazon SES, Mailgun, Postmark AI-powered email content — OpenAI, DeepSeek, Mistral, Google Gemini integration for content optimization and image generation Advanced form integrations — Contact Form 7, Gravity Forms, Fluent Forms Page builder integrations — Elementor, Bricks Advanced automation workflows — triggers, conditions, and behavioral targeting Custom fields and advanced segments — target subscribers based on behavior and data Premium email templates — professional designs ready to use Embed opt-in forms on external websites — grow your list beyond WordPress Bounce management — automatic handling via email provider APIs Automated double opt-in follow-ups — re-engage pending subscribers White-label options — customize MailerPress branding Priority support — dedicated customer assistance Developer-Friendly MailerPress is built for developers who need full control: Hundreds of hooks and filters — customize every aspect of the plugin REST API — build custom integrations and applications MJML support — use MJML templates for advanced email design workflows React-based architecture — modern, extensible, and performant Privacy & GDPR MailerPress is fully GDPR-compliant and privacy-first. No data is collected by us — everything stays on your server. Built-in unsubscribe links, double opt-in, and data export tools help you stay compliant. When using third-party email providers, please review their respective privacy policies. Translations MailerPress is available in English, French, Spanish, Dutch, and Arabic. Help translate MailerPress into your language. From the same team Try SEOPress, the best SEO plugin for WordPress