My Isp has just started blocking outgoing port 25. I run a small home businness and once a month we send out about 2000 email invoices. I have a colo box that i was connecting to , to send these emails. My ISP also shutsdown its smtp server after i send about 10 emails in arow. I called them and they have acknoloeged the fact that they block the outgoing.
I can change the port on my smtp server to listen on another port, but my billing program does not allow modifing the port.
So does anyone know how i can do some kind of port forwarding?
if i had a local linux box , i could probably do something.
My router does port forwarding, but only coming in