I have created an SMTP virtual service for KEMP which directs traffic to an Ironmail (real) server, however the server cannot be monitored on port 25 using SMTP protocol. However, if I disable monitoring I am able to telnet through the virtual service to Ironmail. Also, if I add an Exchange 2007 server as a real server it is able to monitor that service. Both Ironmail and the Ex2007 server are on different subnets to the appliance. Below is the error I get, please let me know if you have any ideas:
Jun 5 11:47:18 NYXNLB1 l4d: Removing RS 10.38.1.7:25 from VS 10.96.1.18:25(SMTP out) - EOF or Incorrect data received
Jun 5 11:47:18 NYXNLB1 l4d: VS 10.96.1.18:25(SMTP out) Taken out of service due to failed Real Servers