My 2 Outlook accounts are blocking emails from one of my largest and most important clients whose domain name is attglobal.net.  I had this problem before in May of this year and received some correspondence on the Hotmail forum telling me what to check.   Eventually the problem disappeared for a while, but now it has returned.  My client’s address is in my contacts, on my safe senders list, and not on my blocked senders list in both of my accounts.  His emails are not going into my junk folder.  Last May Hotmail told me that my account was almost full, so I deleted quite a few emails.

When my client tries to send me an email, he receives an email saying there is a “persistent transient failure.”  An example is below:

Reporting-MTA:  dns; prserv.net

Arrival-Date:  26 Aug 2013 20:14:56 +0000

Final-Recipient:  rfc822;  xxxx@hotmail.com

Action:  failed

Status:  4.4.7 Unable to contact host for 1 days

Diagnostic-Code:  smtp;  Persistent Transient Failure:  Delivery time expired

Last-Attempt-Date:  26  Aug  2013  20:14:57  +0000

This problem is affecting my business, and I need help immediately.  Can someone go into my two accounts and make adjustments so that I can receive emails from attglobal.net, instead of sending me your “stock” remedies which I have already tried?  PLEASE HELP!