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PGP: Message is blocked - recipient email address could not be resolved. Error code: [0xa1010004].
By Pranay Jha | Feb 10, 2016 | In Articles | Total Views [ 552 ]
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CAUSE:The MAPI address space in PGP Desktop has to be configured to allow specific FAX address spaces.

SOLUTION:Add the following values to PGPprefs.xml

-To find PGPprefs.xml, go to \%username%\UPM_Profile\AppData\Roaming\PGP Corporation\PGP \PGPprefs.xml

-Edit PGPprefs.xml in notepad.

-Find <key>MAPIfaxAddressSpaceList</key>

-Look next text to this string, it will show as <string></string>.

-Replace to <string></string> as <string>FAX</string>,
Note: Same will be performed in entire PGPprefs.xml file wherever you get <key>MAPIfaxAddressSpaceList</key>

Once it will replace, text will be shown as below.

<key>MAPIfaxAddressSpaceList</key> <string>FAX</string>,

-Log off and relogin back to PC, and check fax services. It should work.

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About the Author

Pranay Jha
Pranay Jha
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My name is Pranay Jha, working in IBM as Technical Solution Architect for Virtualization platform. I have been working in IT for near around 11 years. Passionate to get involved as an Independent blogger for my blog I am carrying few industrial certifications as VMware vExpert 2016/2017, VCIX6, VCAP6-DCD, VCAP5-DCD/DCA, VCP6-DCVVCP5-DCV, VCA-Cloud, VCE-CIA, VSP, MCSE, MCITP, MCSA(Messaging). For any query or suggestion, please connect me at Thanks for visiting here.

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