POP3 not working after Raptor Rollout

[julianf]

Hi,

We have recently installed Raptor Firewall on our LAN...we run an Exchange 5.5... with routing enabled...but only to clients that are authenticated - (to prevent SPAM!)

Users are permitted to POP their mail from home. Since the Firewall installation, users can receive mail from home and send internally, but they get an error "550 - relaying not allowed" when trying to send mail to external addresses. In Outlook express, they have enabled the tab that specifies: "use same username and pass when sending mail".

This used to work...the only change is the Firewall...we have tried adding rulz...but nothing seems to work. The strange thing is, when we remove the routing restrictions from within exchange, it works...but this opens the system to SPAM...

Any advise would be appreciated,

Julian

 

[mufka]

I think it might be because the SMTP proxy is enabled on the firewall. Have you tried to mess with the SMTP proxy? You might try disabling it. You can tell that it is enabled if you telnet (from outside) to port 25 on the firewall and get the "Generic SMTP handler" message rather than the "Microsoft Exchange Internet Mail Service 5.5.2650.21"

 

[Zeppster]

You need to set up a smtp connector to route mail to your exchange server.