Currently I am running an email system using the following servers/programs: postfix, cyrus, squirrelmail and openldap.
I am attempting to replace the cyrus and squirrelmail programs with zimbra. I have zimbra authenticating against the legacy LDAP server and have migrated the accounts and email from cyrus.
Our current postfix server has F-Prot anti-virus installed as well as several years of configuration customization to include grey listing, distribution list authorization and unknown user reject.
Rather then figure out how to enable these features in zimbra, just to have them wiped out with a zimbra upgrade, I would just like to keep my postfix setup as an edge MTA.
I have seen a diagram in the zimbra admin manual, but how do you actually configure the zimbra server to use the edge MTA. The relay MTA settings says it is for non-local email only. Do I simply need a different domain (possibly hidden to the rest of the world) for the zimbra server?
Right now when I send an email to "stu at group-w-inc dot com" (stu is an alias only the edge MTA knows about, my account is actually swhitman) from the zimbra server it appears to send the message, but I never receive it. I do not see a log message on the edge MTA and logs on the zimbra server do not indicate an error.
Any help will be appreciated, even if it is a link to documentation or forum posts that I could not find myself.