The mailto black hole
Mailto links are one of the most common conversion points on business websites. A visitor clicks your email link, their mail client opens, they type an enquiry. Great lead. But Google Ads can't track it because the visitor left the browser the moment they clicked the link.
GTM can track the click event, but clicking a mailto link doesn't mean someone sent an email. They might have opened their mail client, changed their mind, and closed it. GTM counts it as a conversion anyway.
How Tagless tracks email enquiries
When someone clicks an email link on your site, Tagless does two things. First, it captures the GCLID. Second, it injects a unique reference code into the email subject line. When the email arrives in your inbox, that reference links the enquiry back to the exact ad click.
This means you can match every email enquiry to the campaign, ad group, and keyword that generated it. Not approximately — exactly.
Qualification matters
Not every email is a lead. Spam, sales pitches, support questions — they all come through the same channel. Tagless lets you qualify which emails are genuine sales enquiries. Only those sync to Google Ads as conversions.
This keeps your conversion data clean and ensures Smart Bidding optimises for real sales enquiries, not inbox volume.