Never miss an expiring certificate again.

Let's Encrypt killed expiry emails. You're flying blind.

On June 4, 2025 Let's Encrypt shut down their certificate-expiration notification emails — the same emails tens of thousands of operators relied on as their first line of defense against an outage.

And it's only going to get worse. The CA/Browser Forum has approved a roadmap that shrinks public TLS certificate lifetimes to 47 days by 2029, with intermediate steps at 200, 100 and 90 days already in motion. Shorter lifetimes mean more frequent renewals, more chance of a mistake, and more chance of a silent expiry.

SSLert is the lightweight replacement. It watches every certificate you point it at — quietly, on a schedule, with the alerts going wherever you already read messages.