When sending outgoing mail the header contains the wrong IP address resulting in NDRs.
I have two external IP ranges from different companies, one for Internet and external access for things like Terminal Servers etc, and another range from another company for emails.
However everything appears to be going through the internet IP range despite all NATs and Ports being configured correctly.
Nothing has been changed and it just started to happen all of a sudden.
I need to be able to change the email IP address to what it should be but cannot find the setting to do so?
Thanks in advance