SMTP with TLS question
I'm trying to enable encrypted email on our corporate server, and I can see the options to enable this in the SMTP-proxy rules. Reading the Watchguard documentation seems to indicate that the firewall will perform TLS negotiation with outside servers, but the docs fall short on what I should do at my internal mail server. Does the firewall handle all the TLS encryption and then pass it down to my mail server like a normal un-encrypted SMTP exchange, or do I also need to configure my mail server to also handle encryption? If so, do I need to use the same certs in both the firewall and the mail server? Any help in setting this up would be most appreciated.