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Error "relaying denied. ip name lookup failed" when sending email in Outlook 2007

I get the following error when I send an email via oitlook 2007:

550 5.7.1 <email@domain.com>... Relaying denied. IP name lookup failed [xxx.xxx.xxx.xxx]

I can receive all emails ok, but can't send.  I try sending myself, but same problem.
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rayluvs
Asked:
rayluvs
5 Solutions
 
Will SzymkowskiSenior Solution ArchitectCommented:
This NDR is due to a permissions issue. Make sure that you have permissions to Send from this mailbox. Open the Active Directory account (make sure that advance features is selected) for this user and click on the Security Tab and Add yourself in there. Give youself Full permissions over this mailbox and include rights to all attributes (including Send As).
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rayluvsAuthor Commented:
I have Windows 7, where can I locate Active Directory account?
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rayluvsAuthor Commented:
Another thing is when I test the connection, its successfull.

where can I locate Active Directory account in my Windows 7?
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rayluvsAuthor Commented:
I just notice something else, when I click on send (on the email screen), the Outbox gets empty fast and the configuration is set to every 30 mins.  Yet, I click Send/Receive, and I dont' see anything, just the error message (i sent it to myself).
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zsaurabhCommented:
in Windows 7, there is no Active Directory
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zsaurabhCommented:
AD is created when you have a Domain and AD resides on a Domain Controller not on a User's PC
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als315Commented:
How you are connected to your mail server? It seems that your recipient's SPAM filter compare IP address in your message with MX record for your domain and they are different. Your had to send messages from your mail server, not from SMTP server of your ISP.
For example:
http://www.mxtoolbox.com/SuperTool.aspx?action=mx:cnn.com
list of possible IPs of cnn.com mail addresses. You can check your domain (all after @) and compare this addresses with your NDR message.
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Casey HermanCommented:
In order to help you figure out this issue, we will need to see the account settings that you have in Outlook. If your email address is comcast.net, you have to be using specific servers and ports to send mail out. The same is true for many ISP's.

Please post the account setup information
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esp-projectsCommented:
Hi there, who is your Internet Service Provider?  They often provide a free SMTP service (ie a service that allows you to send email via their servers).

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rayluvsAuthor Commented:
I think I found the cause.  The domain where I was located had a firewall setting; they checked and fixed it and now all is OK
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rayluvsAuthor Commented:
ok
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