Possibly. Once I understand precisely how it works, I'll come back and post... however I doubt you'll need to resend it. Any that I have sent have worked, and always worked their way to the Sent Box in time. Possibly (and this just a guess), "Outbox" means it hasn't been collected. You could test this by checking the status of the PM you sent to me.
“I hope, Anuruddha, that you are all living in concord, with mutual appreciation, without disputing, blending like milk and water, viewing each other with kindly eyes.” (MN 31)
What is the final conviction that comes when radical attention is razor-edge sharp? That the object of the mind is mind-made (manomaya). (Ven. Ñāṇananda)
"If you have always believed that everyone should play by the same rules and be judged by the same standards, that would have gotten you labeled a radical 50 years ago, a liberal 25 years ago and a racist today." (Thomas Sowell)