Communication limits areset in the Admin section and help you avoid sending one person too many emails.
1. Go to Marketing Activities.
2. Find and select your email program.
3. Under the Setup tab, double-click the communication limit line item.
4. By default, non-operational emails are blocked if communication limits are reached, but if you want to bypass them, clear the checkbox and click Save.
Leaving Block non-operational emails checked will prevent sending the email to anyone who has received more emails than your admin settings allow.