Add a user for less: Add a second user to your account, and you'll get an automatic 10% discount on both accounts! The 10% discount is automatically applied for groups with 2 to 4 users. Accounts with 5 or more users get a 20% discount.
Add AllMail for free: Mailstore accounts can add AllMail for 2 personal domains for free!
If your account should get these discounts and bonuses, you don't have to do anything -- they're being added automatically, starting today. (This means your expiration date will move further into the future.) Pobox Plus users whose price would go down if they upgrade to Mailstore will also be upgraded automatically.