With this filter you can override the email subject sent to the (multisite) user after the account is activated.
activation archives
b3_wpmu_user_activated_message()
With this filter you can override the email content sent to the (multisite) user after the account is activated.
b3_wpmu_activate_user_subject()
With this filter you can override the email subject sent to the (multisite) user to activate his/her account.
b3_wpmu_activate_user_message()
With this filter you can override the email content sent to the (multisite) user to activate his/her account.
b3_before_reject_user()
This hook fires just before a user is deleted (and no more user data is available).
b3_get_activation_url()
This function gets the unique activation url for a user.
b3_after_user_activated()
This hook fires after a user has verified his/her email address.