I have a small program which monitors the UPS. If the power fails, it can send an email. It is doing so through port 25.
My ISP is blocking it, and offers port 2525 as an alternative.
In my Draytek router I can map port 2525 to 25, but that is INBOUND. I need Outboud.
Is there a way, to change the outbound port to 2525, or another solution? (a commercial VPN like Strong VPN, and send the mail there, is an option, but not preferred yet).
WinXP as a OS.
(wild idea: Run Linux mail server in a virtual box, and have it relayed to port 25)?