It’s not a good idea to email someone multiple times a day, or too many times in a week, right? Luckily, Marketo Engage has communication limits to help.
When any person exceeds the set communication limits, Marketo blocks non-operational emails (operational emails always send).
In your Smart Campaign, click the Schedule tab and then Edit Settings.
Check the Block non-operational emails checkbox, and then click Save.
Limit refers to the number of qualified people a Smart Campaign can affect.
To make this the default, edit your communication limits in the Admin section.
Now you can be assured you aren’t accidentally sending too many emails to your audience.