This provides form field validation and spam prevention for zem_contact_reborn.

Specifically:

• submitted field combination check
• submitted field content validation
• anti-spam measures

Once installed, a collection of new tags are available:

• adi_contact_combo – define valid combinations of submitted form fields
• adi_contact_validate – validate the content of submitted form fields
• adi_contact_spam – block spam in submitted form fields
• adi_contact_labels – specify labels to be used in error messages
• adi_contact_checkboxes – to specify which fields are checkboxes

Use them within a <txp:zem_contact> ... </txp:zem_contact> container.

See the help supplied with the plugin, or have a look online.