security.txt (RFC 9116) in Email marketing
It tells a researcher where to report a vulnerability instead of guessing.
- 4Published
- 8Vendors measured
- 50%Of those measured
- 2026-08-31Checked
50% here against 23% across every category we measure. Email marketing sits above the overall share for this criterion.
Back to security.txt (RFC 9116) across all categories, or to Email marketing.
Published
Served at /.well-known/security.txt.
No security.txt found.
We reached at least one address for each of these vendors and none of them carried it. That is what we found at the addresses we checked, on the date we checked them, and not a statement about what the vendor has.
| Vendor | What we found |
|---|---|
| ActiveCampaign | 1 address checked |
| Customer.io | 1 address checked |
| Klaviyo | 1 address checked |
| Postmark | 1 address checked |
Not measured
We could not look at these, or their robots.txt asks us not to. That says something about our measurement, not about them, and they are left out of the percentage above.
| Vendor | What we found |
|---|---|
| Brevo | The vendor’s server blocked or rate-limited our crawler, so this was not measured. |
| Kit | The vendor’s server blocked or rate-limited our crawler, so this was not measured. |
| MailerLite | The vendor’s server blocked or rate-limited our crawler, so this was not measured. |
| Mailjet | This vendor was not measured because our run stopped waiting for it. |
Found something we missed? Tell us and the next run picks it up.