Shawn Everett wrote: > Hi Guys, > > I'm 100% sure this is not a Linux issue but I want a second opinion... > > I have a Linux server running CentOS. It was been absolutely perfect > without any errors or problems. > > Since Monday it has been unable to send email. It is configured to act as > a smart host. All email gets forwarded to smtp.isp.net. Anything happen around that time? Any firewall rules on that box?