You do not have permission to send to this recipient.

They are probably blocking you based on the IP address. This is becoming more common. Hosts are blocking based on the IP range belonging to a range used for dynamic addresses.

Are you using the SMTP connector to send email via your ISP's SMTP server (aka SMART HOST)? This is what you need to be doing.

Simon.

You should make sure your MX IP isn't on an RBL (either at http://www.dnsreport.com or http://mail-abuse.org/cgi-bin/lookup) - Read through this article to find more information (http://support.microsoft.com/default.aspx?kbid=300580)

I agree with Simon ... quite a few DSL sites are on RBL's because of the turn-over ratio and the fact most spammers use DSL or cable of some sort ...

Simon,

I am not using "Smart Host" to send out mail I don't think. If I go to Server Name--> Servers --> Protocols --> SMTP--> Right click on Default SMTP Virtual Server --> Left Click Properties -->Delivery Tab --> Advanced Button....There is no Smart Host listed in the box, just a FQDN of my domain name.

But if I go to Server Name--> Connectors --> MY SMTP Connector--> Right Click --> and then Left Click on Properties I do have an IP in brackets[] and the radio button above checked that says Forward all mail through this connector to the following smart hosts.

Anyway, I did a check at a few RBL sites and it returned no bad IP. Any more ideas guys?

Thanks for your help!
Ed

P.S. My favorite RBL site is http://rbls.org/

It is very common for people to think that the SMTP Smart Host information should go on the SMTP protocol, where in fact for optimum use it should go in an SMTP Connector.

The IP address you have in brackets - do you know what that is? I personally don't like using a static IP in an SMTP Connector in case the ISP changes something. While it shouldn't be causing the problem, I would find out what the dns name of your ISPs SMTP server is (mail.isp.net or whatever) and enter it in there instead - but not in square brackets.

On the connector itself - if you look at the namespace tab - does it have a * or are there seperate domain names listed?

This error is being generated at the other end - you are being blocked for some reason, it is just a matter of finding out why.

Simon.

Simon,

I have thought about changing that for so long, and it probably would be a good idea to change it to the FQDN. Especially if IP of that box changes. It hasn't happened yet, but could and without notice. Thanks for the suggestion.

On the connectors Address Space tab, there is:
type: SMTP
Address: MyDomain.com
Cost: 1
Connector scope radio button checked for Entire Organization & Checkbox for Allow messages to be relayed to these domains is checked too.

I also got this reply this morning:
"Craig's email sent at 1:42 PM was in my email box when I checked at
3:45 PM.  The servers might have been overloaded and we have done
an upgrade recently.  We have not heard of this problem from anyone
else.

I have also responded to Craig's email.

Mary"

I had him send a test via web based POP and that went through. When he sent it via exchange it did not go through.

Thanks in advance again Simon!
Ed

Do you have any other SMTP connectors on that machine?
That connector is currently configured to send email for you OWN domain only over the connector. Not for any others. Others are transfered directly. It should be either a list of domains or * for all domains.

I didn't ask whether the IP address in [] was external to you - ie it is your ISPs SMTP server.

Simon.

Simon,

No I don't have any other SMTP connectors on this machine. I have it setup this way because we have internal Exchange Users and then External POP users. I had to do it this way to keep from having all mail delivered to the wrong place via Exchange. If internal users sent something to an external user with the same domain name it wouldn't get there.  Kind of like a loopback.

Yes the IP is external of our Web Hosting Providers, not ISP's mail server.

Thanks again!
Ed

Simon,

Are you saying set the cost to 2 instead of 1? I will give that a shot and let you know the outcome!

Thanks for all your help Simon!

Yep - it is just a matter of playing around with the cost levels to get Exchange to use them in the right order.

Simon.