Hi! Today my DNS registrar and in my case also the provider of the DNS servers for my domains had a total blackout. He was down for about an hour, none of the 3 DNS servers was reachable. Ok, this was bad, no system could get the IPs for domain names - nothing I can to there except using a 4th DNS server operated by me in the future. But this was not the biggest problem, some DNS servers had the IP for my mail servers stored and tried to connect via SMTP to my courier-mta. The problem now is that courier didn't accept the connections it tried to lookup its own name via the DNS servers in <code>/etc/resolve.conf</code> and ignored the settings in <code>/etc/hosts</code> (basically its own name). (I was also not able to send mails via SMTP). I thought surely I've a configuration error until I found following in the courier-mta FAQ.
<em>NOTE: The Courier mail server does not read the hosts file. It needs a DNS server (although it is possible to have a working the Courier mail server configuration in a completely DNS-free environment, this excersize requires changing many configuration files, and perhaps will be its own FAQ entry some day).</em> Ok, ignoring host entries for foreign systems is ok, but why lookup its own name? This way courier stops working if the DNS server for the own domain/hostname is not reachable for it. The DNS cache servers where reachable the whole time and did resolve very other domain. Can someone enlighten me why this is so and how I can can work around it. Thx! -- Regards, Robert ----- Robert Penz ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ courier-users mailing list [email protected] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
