I've got a web form (on IIS) that sends an e-mail through our e-mail server once the data has been saved. This always worked just fine. But for some reason I'm not getting this error:
No connection could be made because the target machine actively refused it xxx.xxx.xxx.xxx:25
But I don't see anything on the traffic monitor of the firewall (Watchguard) when trying to send this message ...
Note: we can send our 'normal' e-mails and are also getting e-mails from outside, so there is no general e-mail problem with the firewall!