Greylisting Problem - microsoft.public.exchange.admin

Message from discussion Greylisting Problem

Rob

View profile

More options Dec 14 2005, 5:41 pm

Newsgroups: microsoft.public.exchange.admin

From: Rob <R...@discussions.microsoft.com>

Date: Wed, 14 Dec 2005 14:41:17 -0800

Local: Wed, Dec 14 2005 5:41 pm

Subject: Re: Greylisting Problem

  Reply to author
  |
  Forward
  | Print
  | View thread
  | Show original
  | Report this message
  | Find messages by this author
  

The problem is that we don't get any kind of a response back from the other
mail server. At least, none that I can see.
When I contacted the other mail system admin, he told me that he saw the
initial attempt in his logs. But, I couldn't find anything on my side that
would indicate a retry.
I didn't ask for the specific status that they were sending.

Can I just leave the default values on my SMTP Virtual Server for the retry
to work correctly? Or should I tweak them?

Strange thing....Messages started going through shortly after I wrote this
post. But, the initial message that was sent to that domain never made it
through, and I don't believe an NDR was generated. It just looks like it was
lost.

Thanks.

"Rich Matheisen [MVP]" wrote:
> Rob <R...@discussions.microsoft.com> wrote:

> >I am running Exchange 2003 SP2.
> >Yesterday, we discovered that one of the organizations that we frequently
> >email has implemented greylisting on their mail servers.
> >They told us our messages were not getting through because our mail server
> >did not understand how to respond to the error codes that the greylist
> >program was sending back. So, our Exchange server was not properly
> >re-queueing the messages for a re-delivery.

> The respose should be a 4xx status, indicating a transient, retryable,
> error.

> What did they tell you was the status they were sending?

> What happens to the mail at yur side? Is it requeued? Retried?
> Returned as undeliverable?

> >My question: Does anyone know how I need to change any settings on my
> >Exchange server so that it will properly re-try so that it will be allowed
> >through a greylist?

> You don't have to do anything. The 4xx status will be retried on the
> schedule you set on the SMTP Virtual Server.

> --
> Rich Matheisen
> MCSE+I, Exchange MVP
> MS Exchange FAQ at http://www.swinc.com/resource/exch_faq.htm
> Don't send mail to this address mailto:h.p...@getronics.com
> Or to these, either: mailto:h.p...@pinkroccade.com mailto:melvin.mcphucknuc...@getronics.com mailto:melvin.mcphucknuc...@pinkroccade.com

Reply to author Forward