Greetings EE Gods.....
I have an exchange server that sends SMTP out one IP, however gets NAT'd to a second. In Addition, the outbound IP address is NOT MXRecorded because that is not our Primary IP address to the ISP. I have three, and what I need to do is fool the destination end to believe it is coming from one IP vice another. My outbound data is *.*.*.5, however my MXRecord is on my primary line at *.*.*.3
I need the data to continue out on .5, but have the destination think its coming from .3 so I don't get caught in spam filters. I do NOT have the ability to add a record to the MXRecord.