Good time to note that Buypass offers free certificates over ACME. I have a few of my domains configured to use them instead of LetsEncrypt, just for redundancy and to ensure I have a working non-LE cert source in case LE suffers problems like this over a longer time period. Example OpenBSD /etc/acme-client.conf: authority buypass { api url "https://api.buypass.com/acme/directory" account key "/etc/acme/buypass-privk…
A pity that acme-client(1) does not allow for fallbacks, but I will add a mental note about it being an easy enough patch to contribute if I ever find the time.