smart host

Good day, I use Proxmox to server multiple email domains. I need some advise on how to go about the following using Postfix: I have 1 domain that needs to send mail to a certain host for email branding. The rest can stay as is. How would I go about setting this up in Postfix. Please note that...

Today I am using Mail Gateway for all incoming email... to my Exchange Server. For ouotgoing smtp-mail I have an smart host via TLS SSL that I have to use. Can I use Proxmox Mail Gateway as my "Smarthost"? What version of TLS is this? Is it for outgoing, incoming or both? The SSL-certificate...

The outbound smart host connector from 365 to Proxmox is failing with a Relay access denied error. All of Microsoft's IP ranges have been added as trusted networks in the following configuration location: Configuration > Mail Proxy > Networks Here are their ranges...