Emails not being received from sender

Emails from one of our clients, located in Egypt, are not delivered, whereas they are delivered to hotmail or dot Mac.

Is there any reason why Exchange would not let them through? We also run McAfee GroupShield 6.0 (checks Black/White List Server at:, but I have searched the Detected Items database for the sender address and nothing crops up.

I am just enquiring if there are any filters or settings in Exchange I need to know about.  
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itsupport2008Connect With a Mentor Author Commented:
Not sure what was the problem, but I believe it was their end. All seems well now.

Thanks for your help.

You have 2K3, correct? There is nothing on that version, but potentially on the Edge role of 2K7 if anti-spam/Forefront is used. Do you have a spam appliance/software? Is that was your McAfee GroupShield is? (not familiar with that) What blacklist companies are used? Typically, there is a config in a spam appliance/software that typically will block out of country addresses; blacklist companies typically will add them to their listings as well.
itsupport2008Author Commented:
Sorry, we're using 2K3, yes.
Groupshield is A/V and anti-spam s/w. Black/White list is configured in McAfee Groupshield to use:
Have checked that the company was not on any blacklists.
The only other thing I can think of is your junk mail settings in Outlook. Check the International & Block senders tabs. Maybe add that domain to your spam appliance/software as well as your allowed/accepted domains/senders list in Outlook.
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