North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: trapdoor.merit.edu and other impatient Postfix mailers everywhere
[email protected] wrote: > > If you are receiving larger numbers of reports about failing mail > transport from your customers these days, here is why. > > Apparently, the nameservers for the blackholes.mail-abuse.org and > dialups.mail-abuse.org zones are overloaded (I get <10% ICMP_echo's > back, and virtually never any DNS answers), causing a more than > 60-second connection-established -> 220 Hello banner > answering delay on typical Unix-based Sendmail (and other SMTP) > servers with default DNS resolver timeouts. http://www.mail-abuse.org/subscription.html Perhaps this is related? (Server blocked off, rather than answering with a query-denied, perhaps?) -- *************************************************************************** Joel Baker System Administrator - lightbearer.com [email protected] http://www.lightbearer.com/~lucifer |