On 03/09/2010 11:19 AM, Owen O' Shaughnessy wrote: > > Thanks for that, maybe that is what I was looking for, except nobody > listed for backscatter. Nothing in the logs, just a minute and a half > wait, which initially would have sparked a DNS issue, but all the ip's > in question are reversing perfectly and quickly on the commandline and > the two nameservers in resolv.conf are reachable and reacting.
Perhaps you're running into the ident lookup. In its default configuration, Courier will attempt reverse DNS lookup and a connection to port 113 of any host which connects on SMTP. If the connecting host has a firewall that drops connections instead of refusing them, you'll see a very long delay before the SMTP banner. ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ courier-users mailing list [email protected] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
