I have a bad ISP who blocks Port 25 (inbound and out) and relaying over there servers is not allowed
So I need Zimbra to listen on port 10025 and send mail to a mail relay on port 10025 (outbound.mailhop.org) which needs a logon (this hosted by DynDNS).
MAILHOP(my Domains MX lives)-----MYFW(10025)--------->ZIMBRA(SMTP)
I have edited the Postfix Master.cf (10025 inet n - n - - smtpd) file and I dont seem to have IP tables running.
So am I being dumb? any help would be great