greylist problem

Vernon Schryver
Tue Sep 9 16:14:43 UTC 2003

> From: "Rose, Bobby" <>

> It's really not a permanent rejection.  4.7.x just tells the remote smtp
> system to try again later so the question should be why his system is
> resending.   Does he have it configued to resend on failures?

Additional interesting questions include:

  - are you using the default 4.5 minute embargo?

  - did the SMTP client retransmit at all?

> -----Original Message-----
> From: Valentin Chopov [] 
> today I got a complaint from a person about rejectig
> all mail from his domain. When I checked the mailog,
> there were "DCC embargoes" only and not a single successful "Sent". I
> put his mail server (Microsoft ESMTP MAIL Service, Version:
> 5.0.2195.5329) IP address in the whitelist but I don't like this way of
> fixing ;) Any ideas?

I'll add grey-whitelisting realsoonnow.  It's not a good solution, but
it's not as bad as wholesale whitelisting.

The best solution in this case regardless of the DCC or greylisting
is to convince the person of the fact that it is reckless and
irresponsible to expose any Windows box directly to the Internet.
"Microsoft ESMTP MAIL Service" on the Internet ought to be and
perhaps soon will be bait for members of the plaintiff's bar.
But of course, fixing his system not your fight.

Vernon Schryver

More information about the DCC mailing list

Contact by mail or use the form.