Iamschpartacus

The orange border is a sign of spam.

Akismet, the spam filtering plugin, used to be the only reason for this orange border, but on the current versions, the error with the orange border occurs for multiple reasons.

Akismet is not activated.

One of the reasons is the use of comment blacklist. Check your comment blacklist to see if you have words used in the problematic form submission.

I don’t have any blacklisted words.

Also, Contact Form 7 3.1 has introduced nonce verification for contact forms. If the verification fails, Contact Form 7 treats the form submission as spam. This can occasionally cause false-positives when using cache plugins. When an old cache file remains for longer than 24 hours, nonce verification will fail, and you’ll see an error with an orange border.

This might be the problem but I’m not sure which of my plugins are cache plugins. Here are my active plugins…

Collapse-O-Matic
Settings | Deactivate | Edit
Collapse-O-Matic adds an [expand] shortcode that wraps content into a lovely, jQuery collapsible div.

Contact Form 7
Settings | Deactivate | Edit
Just another contact form plugin. Simple but flexible.

Event Calendar WD
Settings | Events | Deactivate | Edit
Event Calendar WD is an easy event management and planning tool with advanced features.

Version 1.6 | By Matt Mullenweg | View details
Select No Page Comment
No Page Comment
Settings | Deactivate | Edit
An admin interface to control the default comment and trackback settings on new posts, pages and custom post types.

Version 1.4.29 | By https://web-dorado.com/ | View details
Select Video Embed & Thumbnail Generator
Video Embed & Thumbnail Generator
Deactivate | Edit | Settings
Generates thumbnails, HTML5-compliant videos, and embed codes for locally hosted videos. Requires FFMPEG or LIBAV for encoding.

Version 4.5.5 | By Kyle Gilman | View details | Donate
Select Video Importer
Video Importer
Deactivate | Edit
Automatically imports videos from YouTube and Vimeo accounts

Version 1.6.2 | By Refactored Co. | View details
Select Video Thumbnails
Video Thumbnails
Deactivate | Edit
Automatically retrieve video thumbnails for your posts and display them in your theme. Supports YouTube, Vimeo, Facebook, Vine, Justin.tv, Twitch, Dailymotion, Metacafe, VK, Blip, Google Drive, Funny or Die, CollegeHumor, MPORA, Wistia, Youku, and Rutube.

Version 2.4 | By Seisuke Kuraishi | View details
Select Yoast SEO
Yoast SEO
FAQ | Premium Support | Settings | Deactivate | Edit