which one is matching first? SNAT or iRule?

Hello folks,

Thanks a lot for responding.

After seeing the diagram you recommended, I conclude that if there is no a packet filter, the virtual server will match first and then its iRule and the other objects inside it even an SNAT. And then, a Global SNAT will match. In my case, I need to erase the global SNAT right?

My irule is as follows:

when CLIENT_ACCEPTED {
               if {[IP::addr [IP::client_addr] equals 10.1.1.2/32]}{
               snatpool snat_pool_mail_mydomain_dot_com
               }
               if {[IP::addr [IP::client_addr] equals 10.1.1.3/32]}{
               snatpool snat_pool_mail_mydomain_dot_com
               }