Contact Form 7 Not Working?
Contact Form 7 is one of WordPress's most popular form plugins—and one of the most common sources of form problems.
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Contact Form 7 powers millions of WordPress contact forms. Its popularity means issues are well-documented, but also means many sites experience the same problems.
CF7 relies on your server's mail function by default, which is often unreliable. Combined with plugin conflicts and configuration issues, CF7 forms frequently stop working.
The good news is that most CF7 issues have known solutions. The challenge is identifying which specific issue applies to your site.
Common Symptoms
- • Form submits but no email received
- • Spinning loading indicator forever
- • Form shows 'failed to send' error
- • Validation errors not displaying
- • AJAX submission not working
- • Form works locally but not on server
Why This Happens
1. Server Mail Function Broken
PHP mail() is disabled or limited on your host, preventing CF7 from sending emails.
2. Plugin Conflicts
Other plugins, especially caching or security plugins, conflict with CF7.
3. Theme JavaScript Conflicts
Theme scripts interfere with CF7's JavaScript functionality.
4. Incorrect Form Configuration
Mail settings, field tags, or validation rules are misconfigured.
5. REST API Disabled
CF7 uses WordPress REST API, which might be blocked by security plugins.
Quick Diagnostic Checklist
Try these steps to narrow down the problem:
-
1
Install SMTP plugin
Use WP Mail SMTP or Flamingo to improve email delivery.
-
2
Check CF7 configuration
Review Mail tab settings for correct recipient and format.
-
3
Test with plugins disabled
Deactivate other plugins to find conflicts.
-
4
Check browser console
Look for JavaScript errors when submitting.
-
5
Verify REST API access
Ensure REST API isn't blocked by security plugins.
-
6
Update CF7
Make sure you're running the latest version.
When to Stop Debugging Manually
CF7 issues usually fall into common categories:
- — Email delivery is the #1 issue
- — Plugin conflicts are common
- — REST API blocking causes AJAX failures
- — Configuration errors are easy to make
SMTP plugin installation fixes most CF7 email issues.
How QuietLoss Detects This Problem
QuietLoss detects JavaScript errors and form functionality issues that might be breaking your Contact Form 7 installation.
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