Maybe this is easy, maybe not, but it definitely is urgent. My network admin quit and now I face the following problem: XS (5.5 SP3) does not receive any mail anymore. It does send mail, it sends mail between it's own users on it's (only) site and server, but no mail is received in the mailboxes.
Except from creating new users and doing some configuration with the books nearby, I know little of troubleshooting XS. My system is configured to have its own site and it has one server connected to it. No fancy stuff, only a bunch of users in one domain. No trusts, no relaying, no limits, just easy as can be (I think). To narrow the problem I have turned off any firewall/proxy.
Where do I start to trace down the problem? How do I know that my ISP is sincere when he says that their configuration is correct? How do I trace a message to (or through) my server? How do the diagnostics loggings work?
I know, only one q. is allowed. So, I'm satisfied with any answer that gives me back my mail.