I have two Exchange 2010 servers. Both have all roles enabled. I set this up to take advantage of DAG's. The DAG's are working fine, as is email.
I have noticed something though.
My Servers are
I don't have a CAS array set up. I have the MX record pointing directly to the IP of Exc1.
I have been noticing in the message header of some of the sent messages from the server that the second server is referenced. Something like this:
Received: from Exc2.mydomain.com (10.235.10.11) by
Exc1.mydomain.com (10.235.10.10) with Microsoft SMTP Server
It looks to me as if the message was sent out of my second server. This seems odd to me.
I have the Send connector setup on Exc1 but I do also have a Send connector setup on Exc2. However, I no users on any database on Exc2.
So my questions:
1. Does Exchange arbitrarily use either server to send messages out?
2. If I disable the send connector on Exc2 will that affect mail delivery in any bad way?
The reason I'm concerned about mail going out of Exc2 is because I have a Reverse DNS PTR set up to point back to Exc1. If mail goes out of Exc2 then I'm concerned certain mail hosts won't accept the messages.