Preserving Client IP address for SMTP traffic

I'm trying the same thing but with SSH instead of SMTP. I've pointed my servers to use the LTM floating IP as their GW and the Virtual Server SNAT Pool to None, AutoMap, and custom SNAT. In each attempt my client IP was logged as being one of the SNAT IPs. Could this be because I am configured on legged (all on one VLAN)?

 

 

Is there a way of getting this to work within a single VLAN, or do I need to have my Virtual Server in one VLAN and my server Pool and SNAT in a different VLAN? Any light on what I might be missing would be grateful.

 

 

Thanks,

 

-uriah