No access to Zimbra from the outside (no mail from outside, webmord only locally). How to fix?

Question

linux

Good evening everyone. Installed Zimbra on centos 7, everything is standard, only changed some ports due to conflicts (8080 -> 8090, 80 -> 86, 443 - 444
) opens, everything is fine. But from the outside, complete silence. The web muzzle does not open from the Internet, letters from the outside do not come, etc. Which is not surprising, since all ports are only listened to locally (if I understand correctly):

tcp        0      0 0.0.0.0:25              0.0.0.0:*               LISTEN      -  
tcp        0      0 0.0.0.0:444             0.0.0.0:*               LISTEN      15905/nginx: worker   
tcp        0      0 0.0.0.0:8090            0.0.0.0:*               LISTEN      -   
tcp        0      0 0.0.0.0:7071            0.0.0.0:*               LISTEN      -

etc.
well, if you map the server from the outside, then no necessary ports are open:

nmap -sT -O greatserver.mu

21/tcp   open   ftp
80/tcp   open   http
81/tcp   open   hosts2-ns
82/tcp   open   xfer
389/tcp  open   ldap
636/tcp  closed ldapssl
3000/tcp closed ppp
3306/tcp open   mysql
5432/tcp open   postgresql
8000/tcp closed http-alt
8080/tcp open   http-proxy

In general, I ask you to help or at least kick where you need it. Thank you.

Answer 1

Which is not surprising, since all ports are only listened to locally (if I understand correctly):

No, not right. The entry 0.0.0.0 means - on all available interfaces.
Eh, does the server go straight to the Internet? No router? If so, are the ports forwarded?
Also do not forget to open ports on the firewall of the centos itself (if enabled) and approve SELinux (if enabled)