Sprwt stops sending that email account-wide - the sending routine checks the switch just before sending and silently returns without creating an Email Log entry. Two related behaviours are worth knowing:

• Sprwt Emails flows that start from the same trigger are also suppressed, because flows require the email to be active.
• Klaviyo events for that trigger are still sent, so a Klaviyo flow can take over. (KLCT does not receive these per-event triggers at all, whether the switch is on or off - it only gets the customer/subscription lists Sprwt syncs to it separately.)

The underlying action itself (the order, refund, subscription change) is not affected. Set the value back to Yes at any time; there is no queue of missed emails.