Upload your TLS Reporting (RFC 8460) JSON report and get an instant analysis of TLS session success rates, failure types, and how to fix them.
Drag & drop your TLS-RPT report here, or click to browse
Accepts .json · .json.gz — max 5 MB
Reports are processed in memory and never stored on our servers.
TLS-RPT reports are sent daily by mail servers that attempted to deliver email to your domain
using TLS. To receive them, add a _smtp._tls DNS TXT record:
Reports arrive as JSON attachments (often gzip-compressed) from Google, Microsoft, and other large mail providers. You can check if your TLS-RPT record is set up correctly using MailCheck with the Advanced → MTA-STS check enabled.