North American Network Operators Group

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Re: and other impatient Postfix mailers everywhere

  • From: John Fraizer
  • Date: Thu Aug 02 18:28:06 2001

On Thu, 2 Aug 2001 [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 and
> 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.

I noticed the same thing this afternoon but, only with  All other mail was making it in fine.

John Fraizer
EnterZone, Inc