How to regenerate sendmail certifcates #certificates #sendmail #tls

https://askubuntu.com/q/1565815/612

How to regenerate sendmail certifcates #configuration #lamp #certificates #sendmail #tls

https://askubuntu.com/q/1565815/612

I'm now removing #HestiaCP from the #server 🤬

#letsencrypt #certificates for the mail domain keep failing to renew automatically. Getting a new certificate for the affected domains is always a nightmare.

I only notice the error when my email programs report an expired certificate. I've been desperately trying to renew two expired certificates for the past hour, but the requests keep getting rejected.

Firstly, this is beyond my capabilities, and secondly, I had better things to do today. I'll try #ISPconfig again.

PKI in a Nutshell
A blog by Ronald

This blog briefly describes theoretically how Public Key Infrastructure (PKI) works. It also introduces the key concepts used in PKI. This is done by describing encryption, decryption, hashing, signing, and authentication using mathematical notations.

#dev #softwaredevelopment #Security #PKI #PublicKeyInfrastructure #Certificates #PublicKey #PrivateKey #Keystore #Truststore

https://jdriven.com/blog/2026/04/PKI-in-a-Nutshell/

Now I get notified when my certificates are expiring before everything breaks.

#monitoring #observability #certificates #grafana #selfhosting #sysadmin