If you have used your maximum distribution volume (this only applies to the plans by volume) and don’t want to switch to another plan you can manually add more volume to your account by purchasing a prepaid plan. In your account click on [My Account] > [Billing] > [Monthly plans & Prepaid]. There you can book the needed volume directly from the overview.
If you have a certain volume per month plus a prepaid plan we will always count the distributed emails toward your monthly volume. Only if this has been used up CleverReach will access your additional prepaid funds.