Milter-greylist

Nope...  When I implemented greylisting, I saw the same problem, so I
asked one of my friends with an earthlink account to test it...

Basically earthlink and mindspring servers treat all 4xx errors as 5xx
errors.  It's a violation of the RFC, and it screws up greylisting.  I
encourage people to move away from non-RFC compliant
mail servers, not only because of greylisting, but because there
really are other legitimate uses of 4xx error codes, and in the case
of earthlink subscribers, their mail won't go through in those cases,
either.

--- In milter-greylist@yahoogroups.com, Bill Levering <idbill@...> wrote:
>
> Earthlink is causing problems (again).
> 
>  From what I gather, it is bouncing messages back to the sender as  
> undeliverable.
> 
> My guess is that there are multiple servers trying to send the  
> message, and none of them get auto-whitelisted.
> 
> Does anyone know what outgoing server they use? netblock? any other  
> ideas.. I just don't want to whitelist earthlink.net.
> 
> As someone once said:
> There is a shitload of zombied/trojaned/proxied spam machines using  
> both their domains as return addesses on the spam.
> 
> Thanx,
> Bill
> 
> >> ------ Forwarded Message
> >> From: Mail Delivery System
> >> <Mailer-Daemon@...>
> >> Date: Fri, 11 Jan 2008 11:36:07 -0500
> >> To: <audra@...>
> >> Subject: Mail delivery failed: returning message to sender
> >>
> >> This message was created automatically by mail delivery software.
> >>
> >> A message that you sent could not be delivered to one or more of its
> >> recipients. This is a permanent error. The following address(es)  
> >> failed:
> >>
> >> ed@...
> >>   SMTP error from remote mailer after RCPT TO:<ed@...>:
> >>   host mail.siriuslink.com [128.121.50.164]: 451 4.7.1 Greylisting in
> >> action, please come back later:
> >>   retry timeout exceeded
> >>
> >> ------ This is a copy of the message, including all the headers.  
> >> ------
> >>
> >> Return-path: <audra@...>
> >> Received: from [75.172.57.67] (helo=[192.168.0.11])
> >> by elasmtp-mealy.atl.sa.earthlink.net with asmtp (Exim 4.34)
> >> id 1JDMrR-0000tk-8u; Fri, 11 Jan 2008 11:36:01 -0500
> >> User-Agent: Microsoft-Entourage/11.3.3.061214
> >> Date: Fri, 11 Jan 2008 08:35:44 -0800
> >> Subject: Re: New Associate
> >> From: Audra Brown <audra@...>
> >> To: Ed Kelly <ed@...>
> >> CC: Crystal Rude <Crystal@...>
> >> Message-ID: <C3ACDAE0.DD7E%audra@...>
> >> Thread-Topic: New Associate
> >> Thread-Index: AchUcALLQVSb38BjEdy7FgAX8gIvqg==
> >> In-Reply-To: <22912DE3-2AF7-4E5A-A3FF-F2B209B6CAB9@...>
> >> Mime-version: 1.0
> >> Content-type: multipart/related;
> >> boundary="B_3282885346_20349590"
> >
>