I finally jumped in and made my evaluation install. Problem now is - no mail is flowing - I need to solve this quickly. Read On.
I need to change both Zimbra Postfix Main cf and Master cf files so I can receive and relay mail to DynDNS. Master.cf and Main.cf are in two places in Zimbra and the Master is write protected. How can I make the following changes without breaking Zimbra? I considered changing the ownership of the files and hacking. But maybe there is a better "Zimbra" way. Suggestions appreciated.
In my previous Postfix Main.cf I set:
relayhost = outbound.mailhop.org:2525
#To allow relay to DynDNS on port 2525 (ISP blocks 25)
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
#To authenticate with DynDNS
On the Master.cf I set:
2525 inet n - n - - smtpd
#To listen on port 2525 of incoming mail from DynDNS