Sending email to particular domain's

[foxfire]

We have relatively new install of Server 2003 with Exchange Server 2003. 99% of the email sent out works fine. However, we have found 3 domains, one being hotmail, that will not accept mail from us. The error returned is:

You do not have permission to send to this recipient.
5.7.1 smtp;550 5.7.1 Unable to relay for xxxxx@hotmail.com

I have checked and we are not an open relay, nor are we blacklisted as spam anywhere that I can find. When the install was first done a month ago, there were no problems sending to the particular domains that we are unable to send to now. Any thoughts would be appreciated. Thanks

 

[ThePhatCoder]

Hi Foxfire,

I've seen something similar before, not sure if it's the cause of your problem but worth a try...

Ask the same user to re-send the message in PLAIN TEXT format. If it was in HTML (or Rich Text ?), some mail servers may reject it.

One of my users had this problem with AOL and Hotmail.

PhatCoder.

 

[Stone1295]

foxfire,

I'm having exactly the same problem here with my mail server. We can email a bunch of different domains but we have identified approximately 6 that we cannot. We get the exact same message as you. Did you ever find a resolution to your problem?

Stone

 

[foxfire]

We never did find the cause of our problem, but have a workaround. I've set the exchange server to relay all outgoing email off of our ISP's mail server.