What ports need to be forwarded for the mail server?

Question

Zimbra

Installed a Zimbra mail server. everything plows from the outside allowed port 25 on Zimbra. Inside the network, everything works, mail is sent and received. Now the task is to open a mail server to clients from the outside so that users can access their mail from home or from phones. What ports need to be opened for this?

Answer 1

Thanks to all! made on it all earned
External Access
These ports are typically available to mail clients.
25
smtp [mta] - incoming mail to postfix
80
http [mailbox] - web mail client
110
pop3 [mailbox]
143
imap [mailbox]
443
https [mailbox] - web mail client over ssl
465
smtps [mta] - incoming mail to postfix over ssl (Legacy Outlook only? If possible, use 587 instead)
587
smtp [mta] - Mail submission over tls
993
imaps [mailbox] - imap over ssl
995
pops [mailbox] - pop over ssl
9071
https [nginx => mailbox] - proxy admin console (if enabled)
Internal Access
These are ports typically only used by the zimbra system itself.
389
ldap [ldap]
636
ldaps [ldaps] - if enabled
7025
lmtp [mailbox] - local mail delivery
7047
http [conversion server]
7071
https [mailbox] - admin console
7072
http [mailbox] - ZCS Nginx Lookup (backend http service for nginx lookup/authentication)
7110
pop3 [mailbox] - Backend POP3 (if proxy configured)
7143
imap [mailbox] - Backend IMAP (if proxy configured)
7306
mysql [mailbox]
7307
mysql [logger] - logger (removed: ZCS 7)
7780
http [mailbox] - spell check
7993
imaps [mailbox] - Backend IMAP SSL (if proxy configured)
7995
pop3s [mailbox] - Backend POP3 SSL (if proxy configured)
8080
http [mailbox] - Backend HTTP (if proxy configured on same host)
8443
https [mailbox] - Backend HTTPS (if proxy configured on same host)
10024
smtp [mta] - to amavis from postfix
10025
smtp [mta] - back to postfix from amavis
11211
memcached [proxy] - nginx route lookups
System Access
22
ssh
53
dns
514
syslogd [logger] (udp)

Answer 2

POP3=110
SMTP=25
IMAP=145

Answer 3

open the manual there in the first pages there is a list of ports and what works through them