User unable to send emails

User cannot send email internally or externally but can receive email.

I have attached a screenshot is the error the user is seeing and also added the warning from the mail flow troubleshooter.
5.7.1: The sender is not authorized to send e-mail messages to this e-mail address. Possible causes: 

1)The session is not authenticated and does not have the 'ms-Exch-SMTP-Submit' permission. 

2)The session is authenticated but does not have the 'ms-Exch-SMTP-Submit' permission. 

3)The 'MAIL FROM' command specified an address at an authoritative domain and the session does not have the 'ms-Exch-SMTP-Accept-Authoritative-Domain-Sender' permission. 

4)The authenticated user does not have permission to submit on behalf of the sender address specified in the header of the message and the session does not have the 'ms-Exch-SMTP-Accept-Any-Sender' permission. 

5)The recipient domain does not match any of the accepted domains and the session does not have the 'ms-Exch-SMTP-Accept-Any-Recipient' permission. 

6)The recipient domain is rejecting all mail from this server using a block list.

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User1.jpg
Aaron_GruberAsked:
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Blue Street TechLast KnightCommented:
Hi Aaron_Gruber!

I need a little more info. Do they have forwarding setup?

Try this: http://technet.microsoft.com/en-us/library/bb217404(EXCHG.80).aspx also http://technet.microsoft.com/en-us/library/aa996395(EXCHG.80).aspx

You may want to check to see if IIS SMTP Service has been installed (“SMTPSVC/LAEXCHANGE1.scmh.com”). IIS SMTP will break Exchange.
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Aaron_GruberAuthor Commented:
This is the ONLY user that is having this issue. We have 400+ users.
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Blue Street TechLast KnightCommented:
Hmmm...It’s got to me some sort of permissions issue based on the info you have provided. In fact 1-6 reasons are all about permissions and 1-5 are all about either an Ms-Exch-SMTP-Submit permission or a Receive Connectors issue.
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Blue Street TechLast KnightCommented:
*be
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Blue Street TechLast KnightCommented:
Does the user have the same issues while using OWA?
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Blue Street TechLast KnightCommented:
You could always remove her mailbox from the server and re-create it from scratch.
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Aaron_GruberAuthor Commented:
We tried with OWA and had the same result. I also removed the mailbox and recreated. Same result. Only thing I can think of is to fire the user :)
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Blue Street TechLast KnightCommented:
hahaha...that's always an option!

Nothing strange or unique about their account? Which gropu they are in etc.?
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Aaron_GruberAuthor Commented:
Turns out they were part of a special security group the limited them from sending emails.
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Blue Street TechLast KnightCommented:
Glad I could help! Thanks for the points.
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