My domain is: pop3.hatters.org.uk
I ran this command:
sudo openssl x509 -in /etc/letsencrypt/live/pop3.hatters.org.uk/cert.pem -text -noout
It produced this output:
Certificate: Data: Version: 3 (0x2) Serial Number: 03:0e:0c:9b:1b:8e:a3:d8:5b:65:5e:c2:cb:29:fb:7c:53:0a Signature Algorithm: sha256WithRSAEncryption Issuer: C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3 Validity Not Before: Dec 24 22:29:17 2019 GMT Not After : Mar 23 22:29:17 2020 GMT Subject: CN=pop3.hatters.org.uk Subject Public Key Info: Public Key Algorithm: rsaEncryption Public-Key: (2048 bit)
My web server is: none (this is a mail server)
The operating system Ubuntu 16.04.6 LTS
My hosting provider: Jump Networks Ltd
I can login to a root shell on my machine: yes
I’m using a control panel to manage my site: no:
The version of my client is: 0.31.0
I am using Gmail as a POP3 client to pick up mail over port 995. This has been working fine until today when it failed with "Server returned error “SSL error: Leaf certificate is expired” Similarly, when I tried logging in using Roundcube webmail system, I see this in the log:
Could not connect to ssl://smtp.hatters.org.uk:993: Unknown reason
Certbot --renew (and the above command) confirm that the cert doesn’t need renewing.
Has anyone else experience this happening?