Hi Referring to 'Securing your ISPConfig 3 managed mailserver with a valid Let's Encrypt SSL certificate' (I'm not allowed link it), we have two dedicated mail server, managed by Ispconfig, the 2nd is a mirror from the 1st server. The 1st server is configured fine, like described in the article. But, how we have to proceed for the 2nd one, because this one is not listed in the Sites/Website/Add new site/Server: drop-down list. Thank you Ivo
So if your first server goes down, you will have users access the secondary with a different hostname?
For incoming mails, we will have mx records with the same priority and balancers in the front for the mailboxes, so the cert between the balancers and mail hosts should be valid.
OK, so you need the same cert on both servers. That means you simply have to sync it between the servers. This might be a good thread regarding connecting: https://forum.howtoforge.com/threads/how-should-my-end-users-connect-to-my-e-mail-services.88472/
Okay, I try that way. Our plan was, to have a cert between the client and the balancers and between the balancers and the mail servers for each mail server a different cert. But you'r right, we can do it also with the same. Thanks a lot
