Sent Messages?

I’ve recently sent a private message and I wondering if there was anyone to make sure it was sent? Like a sent message folder, etc. I just sent a message, but when I checked the stored sent messages, it doensn’t show anything. Does this mean my message didn’t go through?

Hello there. Sent messages count toward your allotted mailbox size, so I wonder if you are over your limit. Are you still able to receive messages?

Another option would be to attempt contacting the recipient to see if they received your message. Thanks!