Every day we loose something like 30% of users just because of activation emails. We can't change this since we have a partnership that it is currently forcing

Every day we loose something like 30% of users just because of activation emails. We can't change this since we have a partnership that it is currently forcing us to take the verification email but I'll not include any kind of a priori verification email in my next applications. A decent way to handle the problem is to add the field in the profile and tell the user to fill the field in order to get notifications and to recover the password. It may be a good idea to display a warning in the profile if there is no verified email address for the account. The best way to make sure the users will actually enter their email addresses is to do something very useful with notifications and/or reports.