If the number of mail sent or the total recipients is greater than the limit specified, then the user will be blacklisted. To remove the user from the blacklist, you will have to raise a ticket on the helpdesk.
Please go through the below skyconnect product specifications
| Total messages per day (from 00:00 mid-night to 23:59 server time) | Normal Users: 500* Power Users: 5000* |
| Total recipients per day (from 00:00 mid-night to 23:59 server time) | Normal Users: 1500* Power Users: 15000* |
| Max number of power users per organization | 3 |