We are using the Open Source edition of Zimbra, and we are trying to host multiple domains. Everything is OK, except, that some of our IPs have low MTA reputation in Senderbase, which makes Ironport to block the emails. After asking why this is so, it turns out, that they are monitoring also the helo that the MTA responds with.
So the problem is that when you telnet to 25 port and type helo mail.domain2.xx, the response is helo mail.domain1.xx
So my question is - is there a way to configure zimbra to use different helo, depending on the domain.
We are using Release 7.1.3_GA_3346.UBUNTU10_64 UBUNTU10_64 FOSS edition.
Thank you in advance.