Hi there,
Thanks for reaching out to us and for your appreciation! Hope you’re doing well,
As a response to your above requirement, we would like to share that there are two ways to achieve your goal.
1) One way of stopping the email campaign is to delete the Reports of the campaign on the Report screen, which will immediately stop the campaign.
Also, after deleting the report, the next batch of emails will not be sent, but the ongoing batch will continue to be sent until it is completed.
2) If you have Email Subscribers Pro or Starter Plan you can easily pause or resume a campaign on the report screen. To learn more about pause/resume campaigns, check out this document.
Hope the above information helps
Let us know if you have any other questions.
Thank you!