This tutorial explains how to delete the existing SNAP preference used by an email account.
Create an instance of
the CEmailAccounts class. 
Create an instance of
the CImIAPPreferences class to be used by the email service. 
Create an instance of
the CIm<protocol>Settings class. 
Where, <protocol> is either Imap4, Pop3, or Smtp.
Populate the CImIAPPreferences class
and the CIm<protocol>Settings class from central repository
(CenRep) using CEmailAccounts ::Load<protocol>SettingsL function. 
Use the CImIAPPreferences::DeleteSnap() function
to delete SNAP preferences that are used for the connection. 
Specify the IAP preference
by using the existing CImIAPPreferences APIs. 
Store the updated settings
classes to CenRep using the CEmailAccounts::Save<protocol>SettingsL function. 
Note: All instances of <protocol> in the preceding steps are either
Imap4, Pop3,
or Smtp.