Hello everyone, I hope you are well. I also have a question related to the certificate so I ended up hitching a ride here. I'm new to unmanaged Vps, we're running Contabo with Centos and AApanel. my problem is with smtp port 587 with Tls authentication. I've tried everything but I couldn't authenticate on the port, just without Tls. I checked, it's open. My email service is sending and receiving via webmail and even Outlook, but no Tls authentication. Someone who has the email service (Dovecot+ Postifix) running and authenticating through Outlook with Tls and could share the configuration files with me? I thank you all.