Turn your PC into a SMTP proxy and defeat Bell blocking port 25

If you need to send emails out to a server using port 25, Bell blocks the port connection. You can only use Bell SMTP servers on port 25. 
I needed to configure a netscreen firewall to send out alerts. There are no options, port 25 must be used.
I created an account on SMTP2GO.COM. They allow authentication by way of the sender Email Address. No password, just the email address.  
SMTP2GO also accepts delivery on port 2525 which is not blocked by Bell. So...
On a PC with the IP address of 192.168.2.103 (running windows 10) I ran the following command:
netsh interface portproxy add v4tov4 listenport=25 listenaddress=192.168.2.103 connectport=2525 connectaddress=43.228.184.5  
This command will redirect port 25 to 2525 on server  43.228.184.5  which is one of the many SMtp2go.com servers.

On the firewall I set the hostname to my email address: mario900 ,set the domain name to gmail.com. Then the sender address for emails are now coming from [email protected]. Set the SMTP server address to 192.168.2.103... 
In effect, emails sent to 192.168.2.103 port 25 redirect to  43.228.184.5 port 2525. 
Does it work? Hell ya! 

Thanks!

Great idea! Thanks, Mario! Looks like SMTP2GO has a free tier that lets you send 1K emails per month.

Cheers 

Great idea! Thanks, Mario! Looks like SMTP2GO has a free tier that lets you send 1K emails per month.

I think its a viable option in some case, but the downside is that you have to leave the relay machine on 24/7

What exactly do you want to use this for? If you don't mind me asking. Your account activity and profile suggest to me that you are up to shenanigans'. Be careful in what you do here Almtech you might be surprised about the results.