In order to prevent abuses and to protect our email servers reputation, we have put fair-usage limits in place for each accounts tier.
Please note that those limits can be lifted upon contacting us at firstname.lastname@example.org after we've clarified your use case.
Receiving: 500 emails / day
Sending : 0
Receiving : 15,000 emails / day
Sending: 200 emails / day
Receiving: 100,000 emails / day
Sending: 2,000 emails / day