Why do I get an error message with an orange border?

The orange border is a sign of spam. It indicates that one of the spam protection modules has detected suspicious activity in the form submission.

Contact Form 7 has several different spam protection modules such as Akismet, reCAPTCHA, and disallowed list. To determine exactly which module has blocked the submission, it is recommended to use the spam logging feature.

Just another contact form plugin for WordPress. Simple but flexible.