I understand zimbra can handle multiple email domains, e.g. firstname.lastname@example.org, email@example.com, firstname.lastname@example.org.
But how does it handle imaps/smtps? My understanding from the web server side of the business is that you would need to have different external IP addresses to handle the SSL/TLS component, since the connection is encrypted before the virtual domain is resolved, so I assume it's likely the same with Zimbra?
i.e. to handle three different email domains, I need three different external IPs?
Thanks in advance for any clarification.