On Mon, 2003-03-10 at 10:32, DOMA Peter wrote: > Both lists stopped, the qrunner process got locked, the posts come in, > but does not go out. > I have the smtp-failure log full of these: > > 451 [EMAIL PROTECTED] (Cannot check <[EMAIL PROTECTED]> at this time - > please try later) > > I read the exim-users archive, and finally found that it's often caused > by dns problems.
Ideally you fix the DNS problems if this is a general problem other than with a number of specific addresses. However there are a set of approaches for this as a general problem:- 1. Run a local caching DNS server, especially if you are more than a 100Mbit link from whatever resolver you use. Make sure the MTA is using that resolver. djb's dnscache works OK for this - see http://cr.yp.to/djbdns.html 2. Don't do DNS lookup (ie recipient verification) in the MTA for Mailman traffic. Instead let the MTA sort it out and deal with the bounces. For exim do something like:- "receiver_verify_hosts = !127.0.0.1/8:0.0.0.0/0" to prevent verifies on mail recipients from a local Mailman install. Either of these will help, although you main answer - and a way of speeding things up for mailman submission is to do (2). (1) will generally speed the MTA. This stuff *is* in the FAQ. See http://www.python.org/cgi-bin/faqw-mm.py?req=show&file=faq06.002.htp http://www.python.org/cgi-bin/faqw-mm.py?req=show&file=faq06.006.htp http://www.python.org/cgi-bin/faqw-mm.py?req=show&file=faq06.008.htp [OK, I admit I have slightly modified the first 2 of these in the light of this question, and although I am sure the stuff about DNS caches is in there somewhere I have explicitly created the 3rd FAQ entry there on DNS cache usage. If people hate those answers please fix them!] Nigel. -- [ Nigel Metheringham [EMAIL PROTECTED] ] [ - Comments in this message are my own and not ITO opinion/policy - ] ------------------------------------------------------ Mailman-Users mailing list [EMAIL PROTECTED] http://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://www.python.org/cgi-bin/faqw-mm.py Searchable Archives: http://www.mail-archive.com/mailman-users%40python.org/ This message was sent to: [EMAIL PROTECTED] Unsubscribe or change your options at http://mail.python.org/mailman/options/mailman-users/archive%40jab.org