I have two domains seperated by VLAN at my datacenter. They are connected to the same switch and use our ASA as endpoint for internet. One is on the Native Hardware assigned interface the other is on the same interface but is a logical Sub.
Mail is on the native VLAN and I cannot reach the external NAT of the Mail server from the Sub-IF domain. I get a timeout. My collegue suggested it is a security context issue. I am not sure how to go about correcting so the mail servers NAT responds to inquiries from the Sub-IF.