On Tue, 18 Aug 2009 19:30:21 -0400, Sam Varshavchik <[email protected]> wrote:
>> Ok, ignoring host entries for foreign systems is ok, but why lookup its >> own >> name? > To make that information available to local filters. Additionally, a failed but it should be the same entry fo> r every mail, or are there setups where this changes? > lookup does not prevent mail delivery, but delays it. What probably > happened > is that most senders timed out before the DNS lookup itself timed out, and > Courier was ready to receive mail. as the DNS caches tried to connect to 3 authoritative servers the timeout was really long. > Furthermore, local IP address lookup may not have been a factor anyway. If > you are using the same DNS servers as recursive resolvers, if they are > listed in resolv.conf, all DNS lookups will go through your recursive > resolvers, including remote IP addresses and senders' domains. > And if you were using some other DNS server for recursive lookups, the > first > time your recursive DNS server failed to contact all of your authoritative > servers, it should've cached this result, for some time, and all future > queries should've probably been bounced back with an immediate SERVFAIL. I've the 3 DNS servers of the data center I'm hosted in entered in on my courier system. All three where reachable the whole time. But it took a long timeout if I queried anything in my Domain. I got an timeout error not a servfail from them, after min. 2 minutes > DNS is fundamental. If DNS blows up, you're dead in the water. There's no > way around having functional DNS. I know but can I somehow force courier so that it does not lookup its own hostname? -- 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
