Cancel Scheduled Email

curl --request DELETE \
  --url https://app.lettr.com/api/emails/scheduled/{transmissionId} \
  --header 'Authorization: Bearer <token>'

{
  "message": "Scheduled transmission cancelled successfully."
}

DELETE

emails

scheduled

{transmissionId}

Cancel Scheduled Email

curl --request DELETE \
  --url https://app.lettr.com/api/emails/scheduled/{transmissionId} \
  --header 'Authorization: Bearer <token>'

{
  "message": "Scheduled transmission cancelled successfully."
}

Cancel a scheduled email transmission before it is sent. Once the scheduled delivery time has passed, the transmission can no longer be cancelled.

Authorization

string

header

required

API key for authentication

transmissionId

string

required

The transmission ID returned when the email was scheduled.

Example:

"12345678901234567890"

Scheduled transmission cancelled successfully