Re: trapdoor.merit.edu and other impatient Postfix mailers everywhere

[John Fraizer <nanog () Overkill EnterZone Net>]

On Thu, 2 Aug 2001 kai () pac-rim net 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.

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


---
John Fraizer
EnterZone, Inc