I have a Siemens PLC with built in web server and smtp capability. I am trying to get this sending emails on the current internet. Once I establish this I hope to run the PLC on the safe network allowing me secure access remotely without the risk of industrial sabotage.
I think Safe will come in real handy for securing industrial systems.
Anyhoow, My BT ISP seems to block port 25
telnet google.com 25 in cmd
“Could not open connection to the host on port 25”
I need help on how to get around this and which email account will allow smtp.
I have been active in this forum for a few years now so i know someone here will point me in the right direction.