Contact Form 7 Conflict Troubleshooting Guide

Most Contact Form 7 conflicts are caused by using multiple recaptcha versions simultaneously or misconfigured SMTP email settings on your domain host. medium confidence based on 5 community reports

Most Contact Form 7 conflicts are caused by using multiple recaptcha versions simultaneously or misconfigured SMTP email settings on your domain host.

Based on 5 community reports.

Linked sources: 2.

Known Issues

Recaptcha v2 and v3 version conflict
Email delivery failure via default PHP mail
Residual integration keys causing form errors

Community Q&A

Why is my Contact Form 7 not sending emails?

Email delivery issues are often caused by your host blocking default PHP mail. Using an SMTP plugin to route emails through a dedicated provider usually resolves this.

Can I use Recaptcha v2 and v3 together in Contact Form 7?

No, using both versions simultaneously causes conflicts. You should choose one version and ensure all old integration keys are fully removed from the settings.

Reddit Sources

Did I waste a year of my life developing a WordPress theme? (r/Wordpress)
Contact form recapture v2 and v3 conflict (r/Wordpress)