How-to

Adding a Mail Check DMARC button to your form

How to add the Mail Check block, what it does for the visitor, and what it scores on the contact.

2 min readLast updated 17 June 2026
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Adding a Mail Check DMARC button to your form

The Mail Check block is a one-click button you can add to any form. It runs a free DMARC and SPF check on a domain the visitor enters, shows them the result, and — because they had to enter a domain to use it — tags their contact record with that domain plus a small lead-score boost.

It's a lead-magnet block: visitors get something useful, you get a richer signal on the lead.

When to use it

Add Mail Check to:

  • The form on your Contact / Demo / Pricing page if you sell anything email-related.
  • A dedicated landing page for an ad campaign targeting IT and security buyers.
  • Your homepage popup if your audience is technical.

How to add it

  1. Open the form builder for an existing form, or create a new one.
  2. Drag in the Mail Check block from the palette.
  3. Position it wherever makes sense — usually after the email field, so the visitor's already invested.
  4. Publish.

There's no config beyond placement. The block handles its own UX — input field, button, results panel.

What the visitor sees

  • A small field labelled "Check your domain's email security".
  • A button: "Run check".
  • When they click, we run a live DMARC + SPF + DKIM lookup against the domain and show the result inline: pass / warning / fail, with a short explanation.

What gets recorded on the contact

If the visitor proceeds to submit the form, the contact is created as normal plus:

  • The company_domain attribute is set to the domain they checked.
  • The lead score gets a +5 nudge (we know more about them than we would otherwise).
  • The source is appended with +mail-check so you can slice analytics by which form variant they came through.

Filtering on it later

In a dynamic audience, you can target by the new attribute:

  • company_domain exists → "everyone who ran Mail Check".
  • source contains "mail-check" → same intent, different angle.

This is a good high-intent segment for follow-up sequences.

Still stuck? Email support or open the support widget in the bottom-right.