i can create with python outlook emails and send them. Im Using
On a general note, no mail server (certainly not Exchange Server)  will let you spoof the sender name and address (unless you were given an explicit permisison) for the obvious security reasons.
You can send on behalf of another Exchange user (if you have the permission) by setting the MailItem.SentOnBehalfOfName property. You can also create secondary Exchange / POP3/SMTP / IMAP4/SMTP accounts in Outlook and send through these accounts by setting the MailItem.SendUsingAccount property to an Account object from the Application.Session.Accounts collection.
Python email create