per-domain SMTP listener IP, SSL cert, EHLO & MTA IP?

[pgn]

i've 10 domains on a single Zimbra server.

i've 10 static IPs, and 10 SSL certs.

i want to assign to each domain a unique:

(1) inbound SMTP-listener IP
(2) SSL cert
(3) EHLO response string
(4) outbound MTA/SMTP sending IP

i can easily get Zimbra's Postfix instance to *listen* on multiple IPs.

the 'rest', iiuc, needs multiple Postfix instances, or some Zimbra provisioning/config ...

I've found plenty of info on setting up the Apache/Tomcat IPs associated with the admin & user UIs. Not so much re: the SMTP/MTA side ...

Any guidance as to how to get this done? any good docs?

thanks.