SentWatch – Email Uptime Monitoring
Monitor WordPress email delivery with instant notifications when problems occur.
Use with caution
SentWatch works, but test it on a staging site before relying on it in 2026. It runs on 30+ sites and was last updated 5 months ago, and scores 45/100 on our health check.
- Small user base (30+ active installs)
- Very few reviews so far
- Only tested up to WordPress 6.9 (latest is 7.1)
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 SentWatch stands todayWordPress.org search rankings
Live position in the plugin search, top 100| Keyword | Position |
|---|---|
| >100 | |
| monitoring | #85 |
| reliability | >100 |
| smtp | >100 |
| uptime | #27 |
Version adoption
Share of active sites per release.
About SentWatch – Email Uptime Monitoring
From the official readme · v1.1.2Description
SentWatch monitors WordPress email delivery reliability with instant notifications when problems occur.
The plugin sends periodic “heartbeats” to our monitoring service. If these signals stop arriving, it means your site has stopped sending emails (SMTP issues, plugin conflicts, server problems), and we notify you immediately.
Key Features:
- Hybrid Heartbeat System – Uses HTTP API with email fallback for maximum reliability
- Automatic Time Sync – Plugin synchronizes with server time to prevent false alarms
- Instant Notifications – Get alerts immediately when email delivery fails
- Zero Configuration – Just enter your API key and you’re done
- Lightweight – No performance impact on your site (runs in background)
- Smart Scheduling – Heartbeats are automatically aligned with server expectations
How It Works:
- Plugin sends a “heartbeat” signal at regular intervals
- Our server tracks when heartbeats arrive
- If a heartbeat is missed, we verify your site is reachable
- If the issue persists, you receive an instant email notification
Subscription Plans:
- Free – 1 site, 24-hour monitoring interval
- Silver – 10 sites, 12-hour interval
- Gold – 50 sites, 6-hour interval
- Platinum – 200 sites, 3-hour interval
Note: This plugin requires a free account on SentWatch.
External Services
This plugin connects to the SentWatch monitoring service to provide email delivery monitoring functionality.
Service Provider: SentWatch (operated by PianoWeb)
Service URL: https://panel.sentwatch.com
What data is transmitted:
-
During initial setup – When you connect the plugin with your API key:
- Site URL
- Site name
- WordPress version
- PHP version
- Plugin version
-
During periodic heartbeats – Sent via email at intervals determined by your plan (every 3-24 hours):
- Timestamp
- Site URL
- Plugin version
-
During status checks – When you view the plugin settings page or when the plugin syncs configuration:
- Site UUID (unique identifier)
- API Key (for authentication)
When data is sent:
– On initial plugin activation and setup
– Periodically via scheduled email heartbeats (frequency depends on your subscription plan)
– When you manually test email delivery
– When the plugin checks for configuration updates (daily)
Why this data is sent:
This data is necessary for the monitoring service to track whether your WordPress site is successfully sending emails. If heartbeat emails stop arriving, the service alerts you that your site’s email functionality may be broken.
Legal:
– Terms of Service: https://panel.sentwatch.com/terms.php
– Privacy Policy: https://panel.sentwatch.com/privacy.php
By using this plugin, you acknowledge that your site will communicate with the SentWatch service as described above.
Installation
- Upload the plugin files to the
/wp-content/plugins/sentwatchdirectory, or install directly through WordPress plugins screen. - Activate the plugin through the ‘Plugins’ screen in WordPress.
- Go to Settings > SentWatch and enter your API Key from your SentWatch dashboard.
- Click “Save & Activate” – monitoring starts automatically!
Frequently asked questions
Is it free?
Yes, the basic monitoring plan (1 site, 24-hour interval) is free forever.
How does it work?
The plugin sends heartbeat signals via HTTP API (with email fallback). Our servers track these signals and alert you if they stop.
What happens when my email stops working?
You’ll receive an instant notification email (sent from our servers, not your site) so you can fix the issue immediately.
Does it affect my site’s performance?
No. The plugin runs a lightweight background task that takes milliseconds to complete.
What if my server’s clock is wrong?
The plugin automatically syncs with our server time to prevent false alarms from clock drift.
Changelog
1.1.2
- Added visible support links for setup and connection errors
- Improved API error details shown during site connection
- Report the triggered heartbeat attempt ID to the SentWatch panel
- Report wp_mail() failure during panel-triggered tests instead of assuming success
1.1.1
- Fixed plugin admin status UI to align with the new SentWatch panel health model
- Improved uptime history colors and labels in the WordPress admin page
1.0.0
- Initial release
- Email-based heartbeat monitoring system
- Automatic time synchronization with server
- Smart schedule alignment based on subscription plan
- Simple admin settings page with connection status
- REST API endpoints for remote monitoring and configuration sync
For developers
Is this your plugin? Show off the numbers.
Add a live badge to your site, docs or GitHub README. It updates on its own — no account needed.
Best SentWatch alternatives
All email plugins →
FAQ
SentWatch – Email Uptime Monitoring: quick answers
Straight answers, pulled from live WordPress.org data.
Live data from WordPress.org · checked Oct 9, 2026
Is SentWatch free?
Yes. SentWatch is free to download and use from the official WordPress.org plugin directory.
Is SentWatch safe to use in 2026?
SentWatch works, but test it on a staging site before relying on it in 2026. It runs on 30+ sites and was last updated 5 months ago, and scores 45/100 on our health check.
How many websites use SentWatch?
SentWatch is active on 30+ WordPress websites and has been downloaded 570 times since it launched in February 2026. It was downloaded 80 times in the last 30 days.
Does SentWatch work with WordPress 7.1?
SentWatch is officially tested up to WordPress 6.9.10, while the latest release is 7.1.3. It may still work, but try it on a staging site first.
What PHP version does SentWatch need?
SentWatch requires PHP 7.2 or higher. Most hosts run PHP 8.x today, so it works on any modern WordPress hosting.
When was SentWatch last updated?
The latest version, 1.1.2, was released on May 20, 2026 (5 months ago).
Who makes SentWatch?
SentWatch is developed and maintained by pianoweb.
What are the best alternatives to SentWatch?
The most popular alternatives to SentWatch are WP Mail SMTP by WPForms (4M+ installs), MC4WP: Mailchimp for WordPr… (1M+ installs) and Easy WP SMTP (500K+ installs).
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