Many times when we send an email from Salesforce then we are excited to know that whether the email sent by us is yet opened by the user or not.
Salesforce has already provided the functionality to trace this thing but there are some limitation on it like you can track email status only for limited object like Contact,Opportunity and can’t performed some custom action means what in case if someone wants to perform some action as soon as the mail has opened by the end user.
Here are some steps for achieving this functionality.
Step 1. Create a controller to performed some action i.e For now we only create/Update a record for every mail sent from a Salesforce to a particular email address.
Step 2. Create a V.F page which is actually going to be used to trace the Email.
Visulaforce page code :
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