RE: 5.7.1 unable to relay

  • From: "KJ Demott" <prjit@xxxxxxxxxxx>
  • To: exchangelist@xxxxxxxxxxxxx
  • Date: Thu, 05 Sep 2002 15:02:41 -0700

We have never been a relay. If this were the case, wouldn't we get the error every time we tried to send to an earthlink address? It happened Monday morning, Tuesday and Wednesday afternoon and about two hours in the afternoon yesterday. We have been fine all day today. I have never rebooted or stopped/started services to cause a change. It's transient.

From: "Mark Farrow" <mdfarrow@xxxxxxxxxxxxx>
Reply-To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
Subject: [exchangelist] RE: 5.7.1 unable to relay
Date: Thu, 5 Sep 2002 15:18:06 -0600

Earthlink maintains it's own Black Hole List that applies to all their
domains (earthlink, netcom, mindspring, rmi, etc)  If you have ever been
an Open Relay, try sending email (with the bounced message and you
mailserver ip and domain) to


-----Original Message----- From: KJ Demott [mailto:prjit@xxxxxxxxxxx] Sent: Thursday, September 05, 2002 1:48 PM To: [ExchangeList] Subject: [exchangelist] 5.7.1 unable to relay

I am running SBS2000 (Exchange 2000 sp3). The after double checking
Mark's article, the relay settings are just as described.

Not all the time, but frequently we will get error messages to all

There was a SMTP communication problem with the recipient's email
Please contact your system administrator. #5.5.0 smtp;550 relaying to
_________@xxxxxxxxxxxxx prohibited by administrator.

Frequently with one other organization/domain to whom we frequently
communicate we receive the following error:

You do not have permission to send to this recipient. ... #5.7.1
5.7.1 Unable to relay for ______@xxxxxxx

I don't know if they are related problems or not. For a while I thought
was a problem with the recipient's server, but I don't think earthlink
down as often as I receive these errors.

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