There are three possible statuses for a flow email: Draft, Manual, or Live. To change the status of an email, click the email and then change the status in the lefthand panel. You can also toggle an email's status on the card itself.
When you are done configuring a new email, and are interested in testing it out, you can place it in Manual mode. When an email is in Manual, it is active in your flow but no emails will trigger automatically at send time; you will need to manually review and send all scheduled emails.
Sending Emails that Need Review
When an email's status is Manual, at send time Klaviyo will move each recipient to a "Needs Review" list instead of automatically sending the email.
If you click on a given email, in the lefthand panel you will see an Analytics (30 Days) section that shows email activity from the last 30 days. Here, you will see how many recipients require your review.
To view recipients on the manual Needs Review list, click View all Analytics in this sidebar and you will be taken to the full Recipient Activity report for the message. Clicking on Needs Review in the sidebar will also take you directly to this list of recipients.
You can individually preview, send, and/or cancel each email that requires your review. If you have a lot of recipients that need review, you can bulk send and cancel emails with the Send All and Cancel All buttons, respectively. If you send an email to a contact who is in Needs Review and no longer meets the primary filters for the flow, they will be skipped and will not receive the email.
Turning an Email from Manual to Live
When you turn an email from Manual to Live, recipients that are scheduled and "Waiting" to receive the email will automatically receive the email at send time.
Note that when a flow email's sending status is updated from Manual to Live, we will not automatically send emails that are on the Needs Review list. These emails will still require your manual review in order to send.