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To upgrade your account click the Account Info link in the blue top area, and then you'll see the screen above. Then click the Upgrade Account button.
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You'll then be taken to the Upgrade Account tool. From here you have several options:
- Upgrade the number of emails for just the current billing cycle.
- Upgrade the number of emails for both the current billing cycle and all future billing cycles (a permanent upgrade)
- Upgrade the number of data bytes for just the current billing cycle.
- Upgrade the number of data bytes permanently, for the current and all future billing cycles.