If the email you made is scheduled for sending, you can still edit it for any changes in the recipients, time schedule, email subject, and email content.
1. Go to Mailer.
2. Under Mailer History, click on the scheduled email you want to edit.
3. Click Edit.
4. Make the necessary changes in the scheduled email. For a detailed instruction, go to this article: https://support.castlms.com/doc/creating-and-sending-an-email