Ports

Default Ports Used by Zimbra

External Access

These are ports typically available to mail clients. You may choose not to allow connections to all of these.

25

smtp - incoming mail to postfix

80

http - web mail client

110

pop3

143

imap

443

https - web mail client over ssl

993

imaps - imap over ssl

995

pops - pop over ssl

7071

https - admin console

Internal Access

These are ports typically only used by the zimbra system itself. In a multi-node environment, all nodes will need access to the ldap server or servers (389).

389

ldap

7025

lmtp - local mail delivery

7047

conversion server

7306

mysql

7307

mysql - logger

7780

http - spell check

10024

smtp - to amavis from postfix

10025

smtp - back to postfix from amavis