I am faced with a requirement to merge the mail servers running on 2 VPSes into 1, with a single ip address on NetBSD 9.1 amd64.
I searched around, mainly tls certificate of both domains being different looks a bit gray to me. Some posts say it is possible, while some cite issues with it. I can get into experimenting, but thought of getting a word of advice on the overall idea, feasibility, alternatives etc. If performance isn't critical, purely from networking point of view, would it be possible to run one of the domains in a VM so that both postfix instances can be watertight. Alternatively if getting 2 ip addresses is considered as an option would it ease anything? [Similar question would arise for http, but as of now one domain uses http and the other uses https, so that should be manageable.] -- Mayuresh
