DNS & Email Trust
low Severity
Free Check

SMTP TLS Reporting (TLS-RPT)

Checks for _smtp._tls TXT records (RFC 8460) to receive automated notifications regarding email delivery TLS failures.

Test Your Website for SMTP TLS Reporting (TLS-RPT)

Run this check along with 90+ automated tests across your domain.

Why It Matters

Enables mail administrators to detect when attackers or network faults are causing SMTP TLS downgrade failures.

How We Check This

We query DNS for _smtp._tls.yourdomain.com TXT records for v=TLSRPTv1.

How to Fix & Implement

Copy-paste configuration blocks tailored for your web server or edge proxy.

nginx snippet
# DNS TXT at _smtp._tls.yourdomain.com:
v=TLSRPTv1; rua=mailto:tls-reports@yourdomain.com

Frequently Asked Questions

Does TLS-RPT block delivery?

No, TLS-RPT is purely an automated reporting mechanism.