cisco sa540 - ip alias - external ip showing dedicated wan not alias

Unanswered Question


I'm trying to figure out why recipients of emails from my company show that the mail is coming from our dedicated wan ip instead of the ip alias setup thru the dedicated wan.

The domain is

The external ip address for the sa540, wan1 (no optional interface), is

The ip alias is resolves to for external dns yet it is reporting as the for some recipients.

The mail server was never setup with the ip so i don't think this is a dns cache issue.

What issue in the SA540 would cause the system to show as mail coming from instead of the ip alias



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