Authorize MailAdx with ads.txt

An ads.txt file is a public list, on your own domain, of the companies allowed to sell your ad space. MailAdx uses it to confirm that your inventory is really yours before it sends marketplace demand to your slots.

What needs ads.txt

Publisher accounts created before the check began on 26 October 2026 keep marketplace demand during a 30-day grace period that ends on 25 November 2026. After that, the check above applies to them too. Accounts created since then need it from the start.

Before you start

• Your own website domain and a way to publish a text file at its root, or a page handle on ikpages.com (InfluencersKit can publish the line there for you).
• Your MailAdx seller ID and exact ads.txt line: both are on Monetize → MailAdx → Overview, under Revenue share and verified inventory.

Add the line

1. 1Open Monetize → MailAdx → Overview and select Copy next to your ads.txt line. Where it goes shows the address it must be published at.
2. 2If your website is set in InfluencersKit: create or edit ads.txt at the root of that domain, so it loads at https://yourdomain.com/ads.txt, and paste the line in. Publish the file and open the address in a browser to confirm it loads as plain text.
3. 3If your only site is your InfluencersKit page: select Publish my line on ikpages.com. InfluencersKit publishes your line in <handle>.ikpages.com/ads.txt (your page's own file, listing only your line) within about 30 minutes, and your page becomes the domain MailAdx checks. Owners and admins can do this.
4. 4Select Check my ads.txt now. You can check once a minute. If the result says the line is missing just after you published it, check again a little later.

mailadx.com, 500123, DIRECT

What happens next

MailAdx checks the file on your domain and records the result, and Overview shows it with your status: Verified, Not verified yet with the date your grace period ends, or Not verified. A good result makes your inventory eligible for marketplace demand. It doesn't guarantee that an ad will fill.

What can go wrong

• Wrong domain: MailAdx checks the website saved in your InfluencersKit settings. After you change it, InfluencersKit updates MailAdx within 10 minutes; then check again.
• Your website is on a shared platform such as Substack or Beehiiv: you can't publish ads.txt there. Remove that website from your settings and publish your line on ikpages.com instead, or ask Help & Support about staff verification.
• WRONG_ID or RESELLER in the check result: your file has a MailAdx line with a different seller ID or relationship. Replace it with the line shown on Overview.
• The line was removed or the file moved: eligibility can lapse after repeated failed checks, so keep the file in place.
• Invalid traffic restrictions: a restriction for invalid traffic blocks marketplace demand even when ads.txt is correct. See the Invalid Traffic Policy.