I am replacing our Firewall with a PIX515. The problem is: Old one was managed by our ISP, so I don't have much information about settings, but somehow it could authenticate our pop3 users so:
For smtp server all pop3 users had same ID and password located on old firewall I guess.
And for pop3 server they use their own active directory IDs.
Also we have a sun machine across the VPN connection that uses our mail server to send email.
So when we tested the 515 we got some issues with both pop3 users and sun machine stopped sending email, so I was wondering if I should do more settings on PIX box for relay/authenticate these users.
Right now I only mapped a public IP for exchange server and opened port 110 and 25 on that.
Thanks in advance for any comments.