following organization rejected your message
Dear all,I'm getting the following message when any user try to send outside email to some external domains: Delivery has failed to these recipients or distribution lists: 'email@hotmail.com' An error occurred while trying to deliver this message to this recipient e-mail address. Microsoft Exchange will not try to redeliver this message for you. Please try resending this message, or provide the following diagnostic text to your system administrator. The following organization rejected your message: bay0-mc2-f36.Bay0.hotmail.com.Any advice ??
February 25th, 2010 9:10am

I'd start with this:http://social.technet.microsoft.com/Search/en-US/?query=hotmail&rq=meta:Search.MSForums.ForumID(001aa244-e203-487c-83b3-eafa77014b5c)+site:microsoft.com&rn=Admin+ForumYou are not alone.
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February 25th, 2010 11:46am

Hi, Could you please paste the complete NDR here? All emails to hotmail have this issue? I also suggest you to do an outbound email test in the following website. https://www.testexchangeconnectivity.com/ Thanks, Elvis
March 2nd, 2010 8:48am

The test was successfull ..
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March 3rd, 2010 5:34am

Hi,This may be due to the lack of spf record for the sending ip. This is a tool from microsoft that helps create the spf record that you need to havehttp://www.microsoft.com/mscorp/safety/content/technologies/senderid/wizard/Check this link also to know more about spf records http://www.openspf.org/Another possibility would be that you have been blacklisted due to NDR attackes or you being used as a open relay. Regards from www.windowsadmin.info
March 3rd, 2010 5:49am

Hi,Can you check if your organisations Ip adress is blacklisted on the internet.There are various site from which you can check. Some of them are listed belowhttp://www.blacklistmonitoring.com/lookup/ http://mxtoolbox.com/blacklists.aspx Mahendra
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March 3rd, 2010 6:04am

Chance is your email server might be blacklisted as spammer, e.g. allowing open relay.
March 3rd, 2010 9:12am

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