WWW Doesn't work and Account Freezing

Ask your technicians what the problem was - there could be several causes. Ultiimately however it's going to be related to file ownership, file permissions (less likely), or incorrect paths (even less likely). If the user can't chmod then it's likely to be file ownership.

Not sure about the DNS problem, could be anything since you haven't checked much. Check out whether the A record for something.com exists then check out whether mail.something.com exists. It's likely the zone isn't being loaded because of a syntax error or because the serial number wasn't updated (in which last case restarting named would solve the problem).

Cheers,

brian