I am panicked so I hope I make sense.

Zimbra works fine from my desktop via Outlook and via the web.

The POP3 users in other buildings same LAN different subnet, cannot send mail via Outlook and SMTP. I think it is because they are on a subnetted segment separate from the Zimbra server.

How can I get Zimbra to recognize my two other subnets as allowed Relays?

Cheers,

Travis