sending email

send correctly but it go in 2 folder
we can see in send folder and also in the inbox
can we not the one in inbox? how?

What you are seeing is the conversation feature which  displays all messages that make up that conversation no matter which folder they are in. But  this is for display only, and the sent messages are still in the Sent folder. They have not been moved.

To turn off conversations, use Menu > View > Conversations.