Undo Send and delivery status

Choose an Undo Send delay in Settings → Mail. After pressing Send, use Undo during that window to return to the draft. This delays submission; it cannot recall a message after the provider accepts it.

A scheduled message has a different lifecycle: review it in Scheduled, change the time or cancel it before execution. Attachments must finish uploading and pass size checks before submission.

Watch the final status. A queued or uploading message is not yet confirmed as sent. If delivery fails, use the shown retry or draft recovery action; check Sent before retrying an ambiguous provider response to avoid duplicates. Memory learns from confirmed sends, not canceled or failed attempts.