Forms - disallow submissions with links in the comments (textarea) section

Permalink
I created a contact us page that has a plain text textarea for comments.
Is there a way to not allow users to submit a form that has a link in a textarea? I am using the block form inside concrete5 which creates an express form.

View Replies:
Gondwana replied on at Permalink Reply
Gondwana
Have a browse through this:
https://www.concrete5.org/marketplace/addons/contact-form-no-links1...

It isn't watertight (especially with all the newish weird TLDs).