Comment by compumike

Oof, you're right, that's rough that it's so soon after they discontinued their email service!

I wrote this blog post a few weeks ago: "Minimal, cron-ready scripts in Bash, Python, Ruby, Node.js (JavaScript), Go, and Powershell to check when your website's SSL certificate expires." https://heiioncall.com/blog/barebone-scripts-to-check-ssl-ce... which may be helpful if you want to roll your own.

(Disclosure: at Heii On-Call we also offer free SSL certificate expiration monitoring, among other things.)