Croms MailPress
A powerful and flexible email delivery manager for WordPress. Supports multiple SMTP profiles, external SMTP relays, and high-speed API integrations.
Solid choice
Croms MailPress is a solid plugin choice in 2026, with a few things worth checking first. It runs on 10+ sites and was last updated 1 month ago, and scores 62/100 on our health check.
- Tested with the latest WordPress (7.1)
- Small user base (10+ active installs)
- Very few reviews so far
How does it stack up?
Side-by-side on installs, updates, ratings & support
Daily downloads
Download spikes usually follow a new release — each site that auto-updates counts as a download.
Rankings
Where Croms MailPress stands todayWordPress.org search rankings
Live position in the plugin search, top 100| Keyword | Position |
|---|---|
| bulk email | >100 |
| >100 | |
| >100 | |
| newsletter | >100 |
| smtp | >100 |
Version adoption
Share of active sites per release.
About Croms MailPress
From the official readme · v1.0.1Description
Croms MailPress is a comprehensive email delivery solution designed to provide flexible, reliable, and high-performance mailing capabilities directly from your WordPress dashboard. Whether you need to send personalized newsletters, transactional emails, or bulk announcements, this plugin ensures your emails reach their destination securely and efficiently.
Key Features
- Scheduled Sending: Easily schedule your emails to be sent at a specific date and time, perfect for newsletters and timed announcements.
- Recipient Management & CSV Import: Send emails to manually entered addresses or upload a CSV file with up to 100,000 recipients.
- Detailed History & Resending: Track the status of every email sent. View success/error logs and easily retry failed deliveries with a single click.
- Flexible “FROM” Profiles: Register and manage multiple sender addresses and their corresponding SMTP server settings. Switch between them seamlessly when composing emails.
- Opt-out & Bounce Handling: Manage user subscriptions with a dedicated opt-out list. Manually or automatically classify emails as allowed, paused, hard bounce, soft bounce, or blacklisted.
- Safe Opt-out Page Customization: The
[croms_mailpress_optout]shortcode uses a fixed plugin-controlled template. Administrators can change labels, messages, layout preset, color preset, width, and email visibility without saving arbitrary HTML, CSS, JavaScript, or PHP. - Multiple Sending Methods: Choose between individual SMTP profiles (Account-based), external SMTP Relays, or high-speed API Integrations for massive scale delivery.
- Bulk Delivery via Cron: Easily schedule and dispatch large volumes of emails using external Cron jobs. The built-in setup guide helps you configure Cron for both rental servers (e.g., cPanel, XServer) and VPS/Cloud environments.
Opt-out Page Design Customization
The public opt-out form generated by [croms_mailpress_optout] does not provide custom code textareas. This is intentional for WordPress.org review compatibility and user safety. Use the structured settings in Mail Manager > General Settings to adjust the heading, explanatory text, button labels, success messages, design preset, color preset, width, and whether the recipient email address is displayed.
For advanced visual customization, add CSS through WordPress core features such as Appearance > Customize > Additional CSS or the Site Editor’s CSS tools. The fixed template exposes stable classes such as .croms-mailpress-optout, .croms-mailpress-optout__card, .croms-mailpress-optout__title, .croms-mailpress-optout__notice, and .croms-mailpress-optout__button.
External Services / Third-Party APIs
This plugin supports optional delivery through the third-party service smtp-relay.jp (Croms SMTP Relay Service).
- What the service is used for: The service is used only when the site administrator selects either the SMTP Relay delivery method or the API Integration delivery method in this plugin. It is also used when the administrator runs the relay/API connection test from the plugin settings screen.
- What data is sent and when:
- SMTP Relay: When the SMTP Relay delivery method is selected and an email is sent, the plugin connects to the configured
*.smtp-relay.jpSMTP server and sends the email for relay delivery. This includes the sender address, recipient address, subject, message body, and any attachments included in the email. When the administrator runs the SMTP relay connection test, the plugin connects to the configured*.smtp-relay.jpserver to verify connectivity. - API Integration: When the API delivery method is selected and an email is sent, the plugin sends a JSON request to the configured
https://*.smtp-relay.jp/receive.phpendpoint. This request includes the API key in the request header, the sender name and address, recipient address, subject, HTML message body, and any attachments included in the email. When the administrator runs the API connection test, the plugin sends a test request to the configured API endpoint that includes the API key and uses the site’s administrator email address as the sender and recipient for the test payload.
- SMTP Relay: When the SMTP Relay delivery method is selected and an email is sent, the plugin connects to the configured
- Service provider links: Please review the service terms and privacy policy before using the external delivery methods:
- Terms of Service: https://wp.croms.jp/smtp-relay-terms/
- Privacy Policy: https://wp.croms.jp/smtp-relay-privacypolicy/
Installation
- Go to Plugins > Add New in your WordPress dashboard.
- Search for “croms-mailpress” and click Install Now, then Activate the plugin.
- Navigate to Mail Manager > General Settings to configure your setup.
- Add your sender profiles under Mail Manager > FROM Addresses.
- Set up your delivery method in Mail Manager > Send Settings.
- Follow the “Cron Setup Guide” in the General Settings to configure your external Cron job for automated background delivery.
Frequently asked questions
Can I use this plugin for free?
Yes! The plugin itself is fully functional. You can use your own SMTP servers (your web host’s SMTP) completely free of charge. For extremely large volumes, you have the option to connect external paid SMTP relay or API services.
Can I include an opt-out (unsubscribe) link in my emails?
Yes. You can easily include an opt-out link in your emails. The plugin automatically generates a dedicated unsubscribe page. When a recipient clicks the link, WordPress processes the request and automatically stops future deliveries to that address.
Can I customize the opt-out page design?
Yes. You can adjust text labels, messages, layout preset, color preset, width, and email visibility from the plugin settings. The plugin does not store arbitrary custom HTML, CSS, JavaScript, or PHP. For advanced styling, use WordPress core Additional CSS or Site Editor CSS with the documented .croms-mailpress-optout* classes.
Can I personalize emails with user-specific information when sending in bulk?
Yes. By using the CSV import feature, you can include custom data for each recipient. In addition to the email address, you can specify up to 4 custom fields (such as names or specific text) per recipient and insert them dynamically into your email body.
Why do I need an external Cron job?
WordPress’s built-in WP-Cron relies on website traffic to trigger events, which can be unreliable for bulk email delivery. Using a real server-level Cron job guarantees that your emails are processed consistently and exactly on schedule without slowing down your site for visitors.
Changelog
1.0.0
- Initial public release.
- Implemented Account-based SMTP, Relay, and API delivery methods.
- Added subscription management and comprehensive delivery history.
- Added Cron setup guide for stable background processing.
Screenshots
For developers
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Best Croms MailPress alternatives
All bulk email plugins →
FAQ
Croms MailPress: quick answers
Straight answers, pulled from live WordPress.org data.
Live data from WordPress.org · checked Oct 5, 2026
Is Croms MailPress free?
Yes. Croms MailPress is free to download and use from the official WordPress.org plugin directory.
Is Croms MailPress safe to use in 2026?
Croms MailPress is a solid plugin choice in 2026, with a few things worth checking first. It runs on 10+ sites and was last updated 1 month ago, and scores 62/100 on our health check.
How many websites use Croms MailPress?
Croms MailPress is active on 10+ WordPress websites and has been downloaded 271 times since it launched in June 2026. It was downloaded 55 times in the last 30 days.
Does Croms MailPress work with WordPress 7.1?
Yes. The developer has tested Croms MailPress up to WordPress 7.1.2, the latest release. It requires WordPress 6.0 or newer.
What PHP version does Croms MailPress need?
Croms MailPress requires PHP 7.4 or higher. Most hosts run PHP 8.x today, so it works on any modern WordPress hosting.
When was Croms MailPress last updated?
The latest version, 1.0.1, was released on August 24, 2026 (1 month ago).
Who makes Croms MailPress?
Croms MailPress is developed and maintained by croms.
What are the best alternatives to Croms MailPress?
The most popular alternatives to Croms MailPress are Newsletters (2K+ installs), Mass Email To Users (800+ installs) and MailBluster for WordPress (100+ installs).
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