python stmplib send mail

class SendMail:
        def __init__(self,smtpadd,fromadd,toadd):
                self.Smtpadd = smtpadd
                self.Fromadd = fromadd
                self.Toadd = toadd
        def Login_Smtp(self,password):
                self.smtp = smtplib.SMTP()
                self.smtp.connect(self.Smtpadd,25)
                self.smtp.login(self.Fromadd,password)
        def Send_msg(self,subject,body):
                body = base64.b64encode(body)
                msg = 'From:%s\nTo:%s\nSubject:%s\nContent-Type:text/html\nContent-Transfer-Encoding:base64\n\n%s'%(
            self.Fromadd,self.Toadd,subject,body)
                self.smtp.sendmail(self.Fromadd,self.Toadd,msg)
        def Smtp_Logout(self):
                self.smtp.quit()