The Office 2010 No Default Mail Client Error Message
The full error message is as follows:
Either there is no default mail client or the current mail client cannot fulfil the messaging request. Please run Microsoft Office Outlook and set it as the default mail client.
There are a couple of different ways to resolve this – first of all and most simply, a change to the System Registry
To begin with, go to Start > Run (or Start > Search on Windows Vista and 7) and Enter regedit to open the System Registry.
Most importantly, the next step is to backup the System Registry – go to File > Export to do this, with either the root Computer item selected or HKEY_LOCAL_MACHINE. Once the export has completed, proceed to locating and deleting the following entry:
For 32 bit Windows XP, Vista and 7, find and delete:
64 bit users will need to locate and remove:
Once deleted, close the registry editor, and open Outlook 2010. Next, go to Start > Control Panel > Programs > Programs and Features, select Microsoft Office 2010 and click the Change button – the Microsoft Office 2010 setup screen will then be visible.
(Full details on how to set an application as the default can be found in our guide Removing Google Chrome as Your Default Browser.)
Next, click Repair, then click Continue – follow the repair process through to the end and then follow any onscreen instructions.