iRule SMTP Help

So in an effort to correct this problem, I changed the snat automap in the iRule to reject and drop. This however didn't correct the issue and everyone inside and outside of the data groups can connect.

i think it should work. can you try this?

when CLIENT_ACCEPTED {  
  if { [ class match [IP::client_addr] equals smtp_all_allowed ] } {
    snatpool smtp_allowed
  } elseif { [ class match [IP::client_addr] equals smtp_internal_only ] } {
    snatpool smtp_internal
  } else {
    reject
  }
}