Exchange 2007 "550 5.7.1 Unable to relay"

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Mezlo

We have a single Exchange 2007 server in our domain. I'm trying to

allow a single machine on our local network to send email through it.

I've followed multiple step-by-step documents on setting up receive

connectors but no matter what I do I still get "550 5.7.1 Unable to

relay" when sending to an external email address from that machine.

I'm confident I've set up the receive connector correctly so what

other settings in exchange 2007 can cause this error?

Mezlo
 
R

Rich Matheisen [MVP]

On Mon, 15 Mar 2010 14:55:13 -0700 (PDT), Mezlo <mezlo@sunfire.org
wrote:


> We have a single Exchange 2007 server in our domain. I'm trying to
> allow a single machine on our local network to send email through it.
> I've followed multiple step-by-step documents on setting up receive
> connectors but no matter what I do I still get "550 5.7.1 Unable to
> relay" when sending to an external email address from that machine.
> I'm confident I've set up the receive connector correctly so what
> other settings in exchange 2007 can cause this error?


I'd have to conclude that you're over-confident. :)

You haven't said what it was you did, nor provided any links to the

instructions you've followed. You don't say whether the SMTP client is

authenticating or using an anonymous session, either.

But given the scant information you've given, and the fact that the

machine is able to use the receive connector to send e-mail to domains

that the Exchange server knows about (i.e. they're "Accepted

Domains"), I'd guess you haven't set the correct permission on the

Receive Connector (Ms-Exchange-SMTP-Accept-Any-Recipient).

http://technet.microsoft.com/en-us/library/bb232021(EXCHG.80).aspx

-
Rich Matheisen

 
M

Mezlo

On Mar 15, 8:19 pm, "Rich Matheisen [MVP]"

<richn...@rmcons.com.NOSPAM.COM> wrote:
> On Mon, 15 Mar 2010 14:55:13 -0700 (PDT), Mezlo <me...@sunfire.org
> wrote:
>
> >We have a single Exchange 2007 server in our domain. I'm trying to
> >allow a single machine on our local network to send email through it.
> >I've followed multiple step-by-step documents on setting up receive
> >connectors but no matter what I do I still get "550 5.7.1 Unable to
> >relay" when sending to an external email address from that machine.
> >I'm confident I've set up the receive connector correctly so what
> >other settings in exchange 2007 can cause this error?


> I'd have to conclude that you're over-confident. :)

> You haven't said what it was you did, nor provided any links to the
> instructions you've followed. You don't say whether the SMTP client is
> authenticating or using an anonymous session, either.

> But given the scant information you've given, and the fact that the
> machine is able to use the receive connector to send e-mail to domains
> that the Exchange server knows about (i.e. they're "Accepted
> Domains"), I'd guess you haven't set the correct permission on the
> Receive Connector (Ms-Exchange-SMTP-Accept-Any-Recipient).

> http://technet.microsoft.com/en-us/library/bb232021(EXCHG.80).aspx
> -> Rich Matheisen
>


http://msexchangeteam.com/archive/2006/12/28/432013.aspx lists the 2

methods I tried but I finally figured it out. I was setting up the

connector correctly, but for some reason the exchange server was

seeing the IP address of our router, not the IP address of the server

sending the email even though they are on the same subnet. I added the

router IP to the connector and now it works. Thanks for you reply.

Mez
 
R

Rich Matheisen [MVP]

On Tue, 16 Mar 2010 06:35:19 -0700 (PDT), Mezlo <mezlo@sunfire.org
wrote:

[ snip ]


> http://msexchangeteam.com/archive/2006/12/28/432013.aspx lists the 2
> methods I tried but I finally figured it out. I was setting up the
> connector correctly, but for some reason the exchange server was
> seeing the IP address of our router, not the IP address of the server
> sending the email even though they are on the same subnet. I added the
> router IP to the connector and now it works. Thanks for you reply.


Then the problem isn't Exchange, but the router. It shouldn't be

changing the source address unless it's acting as a SMTP relay.

-
Rich Matheisen

 
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