Letsencrypt is going to revoke 3,048,289 certificates tomorrow that "may" have been wrongfully issued due to a wrong CAA DNS check.
To check if you're affected, and need to re-issue certs (before tomorrow!), check here:
@dansup Anyone affected should have received an email too.
@dansup thanks for the heads up
@dansup I force-renewed all certs, it was faster than checking whether I am affected or not or to wait for an email.
They are revoking on March 4 at 00:00 UTC, which is in... less than 3 hours?
@dansup I've checked, I'm fine.
@dansup tbh it's easier to just re-issue certs
Après vérifications, le domaine et les sous-domaines de #FédiQuébec sont "OK" à ce sujet.
"It is not one of the certificates affected by the Let's Encrypt CAA rechecking problem."
#LetsEncrypt
@dansup as easy way to check for invalid domains with letsencrypt: $ curl -d 'fqdn=example.com' https://checkhost.unboundtest.com/checkhost
Server run by the main developers of the project 
It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!
@dansup geez