SMTP outbound F5 Design
I've been unable to find a clear answer for SMTP outbound configuration with F5 Inline. Currently, I have SMTP and other Exchange services working inbound just fine. From the Internet, we're NATing public IP to F5 VIP in the DMZ and the backend pool members are sitting on the inside network, traffic comes in from the the Internet, through the firewall where its NATed and sent to the F5 VIP on the DMZ, where it forwards traffic to pool members on the inside network. Everything is working fine for inbound communications. We want to configure a similar flow for traffic outbound. Where the servers default gateway points to a self IP on the F5 on the inside network. So from an internal client perspective, they send mail to a separate VIP on the inside network, backend pool members receive client traffic and forward to the F5 self IP as it's the default gateway, and the outbound interface for that flow would be sourced from a self IP on the DMZ. Any thoughts on how to achieve this?
I suppose there's another SNAT or possibly route domain somewhere but need some assistance on how to achieve this.