Slitherine

Can someone explain to me the difference between the Sent and Outbox folders?
I send messages and sometimes they end up in one folder, sometimes in the other.
Thanks!

The Sent folder it means your message's recipient received it.
The Outbox folder is the one where the message stays until the recipient didn't received it yet.

Yes, most other internet forums use the same method too. Outbox means the recipient hasn't read it yet..