Exchange 2010 bounces emails to one user

[DrPerceptron]

So, super odd issue that I'm running out of ideas to try and things to google.

 

I have a user who can't be emailed internally.

 

We have 2x hub/mbx servers and an edge server, when one of those hub servers is offline, he can be emailed.

 

I have run the troubleshooters and they come back with nothing, I have disabled all the transport rules, they change nothing, no updates went on to break it and no updates have fixed it.

 

There are no outlook rules in effect, the same applies when outlook is closed.

 

Your message wasn't delivered due to a permission or security issue. It may have been rejected by a moderator, the address may only accept e-mail from certain senders, or another restriction may be preventing delivery.

 

#550 5.7.1 Delivery not authorized, message refused ##

[DrPerceptron]

Just incase I become the next Denver Coder,

 

The only solution I found was to archive the users mailbox, delete their AD account and recreate.

 

http://imgs.xkcd.com/comics/wisdom_of_the_ancients.png

[MatthewL]

No restrictions on the actual account who it can recieve from?

 

Not touched 2010 myself but going back to my 2003 days here.