In Outlook 2007 and 2010 you may get the error “This item contains attachments that are potentially unsafe. You may not be able to view these attachments after you close them” when trying to open attachments in Outlook .
The issue is that the email attachment will be blocked for recipients.
Method 1 :
Uninstall one of these updates :
KB3191898 for Outlook 2007 Users
KB3203467 for Outlook 2010 Users
Method 2 :
Set registry settings to 1 in newly created AllowUnregisteredMapiServices. That will enable loading of unregistered MAPI services.
HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Security\AllowUnregisteredMapiServices for Office 2007
HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\Security\AllowUnregisteredMapiServices for Office 2010
You can use the following registry subkey to apply the registry setting as a domain policy:
HKCU\Software\Policies\Microsoft\Office\12.0\Outlook\Security\AllowUnregisteredMapiServices
To do this :
1.Click Start, in search type regedit and then click OK.
2.Locate and then click the following subkey in the registry:
HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Security\ for Office 2007
HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\Security\ for Office 2010
3.On the Edit menu, point to New, and then click DWORD Value.
4.Type AllowUnregisteredMapiServices for the name of the DWORD, and then press Enter.
5.Right-click AllowUnregisteredMapiServices, and then click Modify.
6.In the Value data box, type 1 to enable the registry entry, and then click OK.
Note To disable the AllowUnregisteredMapiServices setting, type 0 (zero), and then click OK.
7.Exit Registry Editor, and then restart the computer.
Your network may be more vulnerable to attack by malicious users or by malicious software such as viruses. Read more at support.microsoft.com/en-us/help/3191898/descriptionofthesecurityupdateforoutlook2007june13,2017 .
Method 3 :
1.Go to File > Save Attachments.
2.Save the attachments to your computer and then open them.
Method 4 :
When your sender creates a new email be sure that he/she have HTML format selected (not rich or plan) for text (in Options menu) .
Hope this helps .
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