Neutrope Quiet Shield for WordPress

Neutrope Quiet Shield adds lightweight spam and unsolicited-sales filtering to

Contact Form 7 submissions. The idea is simple: let spam and cold sales

mail be received quietly without disturbing the people running the site.

Each submission is scored against a small set of checks you control:

Japanese character ratio: flag messages with too little Japanese text.

URL limit: flag messages that contain more links than you allow.

Submission speed: flag forms submitted suspiciously fast after they were

shown. The timing value is signed so it cannot be tampered with.

Repeat submissions: flag three or more submissions from the same visitor

within five minutes.

NG words: flag messages containing any keyword from your own list.

When a submission is flagged you choose what happens with Quiet Mode:

Quiet Mode on (default): the visitor sees the normal success message, but

no mail is sent. The reason is written to the log.

Quiet Mode off: the submission is stopped with the standard Contact Form

7 error message.

The plugin is deliberately small. It makes no external network requests,