[techhelp]

As stated previously, the Zimbra server was setup with one initial domain as "original.domain.name" and an MX record and DNS are correct for that. No apparent issues.

The blocks happen from mail sent to some servers, from the newly added domain "new.domain.name" that I wish to host on the same server. Looking at the mail headers, and an explanation from the receiving party, is that the mail arrives as if it was sent from "original.domain.name" and they blocked it as bulk mail.

I am led to believe that I should be getting my ISP, who is also our smart host, to configure a reverse DNS record for the domain. For the second domain I am polling pop3 mail from them, and sending out through them until such time as I have finished testing the server and migrated all users over. At that time I MAY point get the ISP to change the MX record to point to our IP (static btw).

I was hoping to keep the ISP as the primary server to keep collecting mail in the event we are offline for some reason... and it buys me time to test and get a secondary server online.

I am more curious as to if it is possible to change the headers to show that is it coming from "new.domain.name" rather than "original.domain.name"... or if this is not even a necessary issue to deal with.

I am new-ish to this as under Hmail *cough* I did not seem to have this issue, or I never found out about it.

Thanks for your reply.