email - Sending gmail to gmail message using smtplib python -

email_user = 'sender@gmail.com' email_pass = 'password' smtp_url = "smtp.gmail.com:587"  def send_email(price):         try:         s = smtplib.smtp(smtp_url)         s.ehlo()         s.starttls()         s.ehlo()         s.login(email_user, email_pass)     except smtplib.smtpauthenticationerror:         print("failed login")     else:         print("logged in! composing message..")         msg = mimemultipart("alternative")         msg["subject"] = "subject"         msg["from"] = email_user         msg["to"] = 'recipient@gmail.com'         text = "hello recipient"         part = mimetext(text, "plain")         msg.attach(part)         s.sendmail(email_user, email_user, msg.as_string())         print("message has been sent.") 

i'm using above script send email sender@gmail.com recipient@gmail.com (both owned me). weird thing happens - see email in sender@gmail.com's sent folder, email isn't received recipient@gmail.com (i checked spam folder well). experienced before? know solution?