If you use Outlook and have several different accounts it is easy to make the mistake of sending email from the wrong account. To stop this all you need to do is add a registry key which will force Outlook to ensure you select the correct account for each email. If the key does not already exist simply create it –
Office 2010 –
HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\14.0\outlook\options
Value Name: ForceAccountSelection
Value type: REG_DWORD: 1
Office 2013 –
HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\15.0\outlook\options
Value Name: ForceAccountSelection
Value type: REG_DWORD: 1 for force
To return Outlook to always using the default account simply change the value to 0 to disable ‘forceaccountselection’