Let's Encrypt 루트 인증서 변경에 따른 자체 호스팅 메일 수신기 업데이트

@david Thanks for this fix! I just ran it and I can see it’s working. :+1:

Is there a way to see which emails were not able to be delivered since October 1st?

I’ve tried this, but I only see 5 requests (the earliest was received on Nov 26):

/var/discourse/launcher enter mail-receiver
mailq

I also tried looking at the logs, but I only got the warning reported here: