Observation: For now it's only possible to hire Mailtrack Pro for your entire team.
If you'd like your whole team to benefit from one of Mailtrack's upgraded plans, we have the perfect plan for you. It's called Mailtrack for Teams.
You can simulate and buy Mailtrack team plans here.
The advantages of this plan include discounts for buying in bulk (5+ accounts), and unified billing so, instead of having multiple separate invoices, renewals, etc. there is a single invoice and renewal date for your subscription purchase.
You can sign up to Mailtrack for Teams via the pricing page on our website*. 
Once you've bought your team plan, you can add/remove users from your team, and increase/decrease the number of users that can be included in your team**, in the team section of your Mailtrack dashboard. 
*Option not available for customers who paid using PayPal, or who signed up to our anniversary/Cyber Monday offers.
**Increasing the number of users in your team will result in a pro-rata charge being made to the credit/debit card linked with your subscription.