Attachments missing in Outlook 2010 but show in Web APp

Question

There was another thread showing this but the answer provided does not seem to apply.  Exchange 2010 SP1 running as virtual system on Server 2008 R2.  4 cores, 12 GB of RAM, 60 GB of free disk space. 
Had an e-mail come in addressed to 2 different people and neither showed the attachment.  Forwarded e-mail to my account.  Using Outlook 2010 on all systems.  The forwarded mail shows as an attachment of 3MB but when I open it, it is just
the message with no attachments.  Open my Outlook Web App and the same e-mail now shows the attachments.   I believe the fact that 3 different accounts show the same result eliminates the possibility of corrupt Outlook profiles. 
Have rebooted the Exchange server with no change.
Any help would be appreciated!
Thanks,
Eric

Answer 1

Is there any firewall hardware on your local network?
What is kind of your attachment?  
Can you receive the same attachment which is compress by zip or winrar ?
Special format attachment will be blocked by outlook or firewall.
It is the way to receive special file by outlook.
1.    
Make sure Outlook is closed.
2.    
Open your registry editor by opening the Run command and type
regedit (regedt32 for Windows 2000).
In Windows Vista and Windows 7 you can also directly type regedit in the Start Menu’s Search box.
3.    
Locate the following key
Outlook 2000
[HKEY_CURRENT_USER\Software\Microsoft\Office\9.0\Outlook\Security]
Outlook 2002
[HKEY_CURRENT_USER\Software\Microsoft\Office\10.0\Outlook\Security]
Outlook 2003
[HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Outlook\Security]
Outlook 2007
[HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Security]
Outlook 2010
[HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\Security]
4.    
Go to Edit-> New-> String Value and name the value
Level1Remove (case sensitive!)
5.    
Double-click on the newly created value and enter the extension including the "dot" that you want to open in Outlook. For instance .exe
If you need to enter more than one extension you'll have to type separate them by a semicolon like this;
.exe;.bat;.url
6.    
Press OK on the input box and close the registry editor
7.    
When you open now Outlook, the attachments which hold those extensions aren't blocked by Outlook anymore.
To let Outlook block those extensions again follow the instructions again but instead of creating the Level1Remove
value delete it.
Another way is to move this mailbox to another database. Maybe there is little corruption in this database.