class Net::IMAP

def create(mailbox)

Related: #rename, #delete

cannot be created.
A Net::IMAP::NoResponseError is raised if a mailbox with that name

to create a new +mailbox+.
Sends a {CREATE command [IMAP4rev1 ยง6.3.3]}[https://www.rfc-editor.org/rfc/rfc3501#section-6.3.3] 
def create(mailbox)
  send_command("CREATE", mailbox)
end