尝试通过smtplib发送电子邮件时出错

Question

当我尝试此代码（向Gmail帐户发送垃圾邮件的2个线程）

server = SMTP_SSL("smtp.gmail.com" , 465)
def ghost(ghost_gmail):

   server.login(ghost_gmail, "test")


   while True:
      server.sendmail(ghost_gmail, target_v, msg_v)
t = Thread(target = ghost , args = ["example@gmail.com"])
t.daemon = True
t.start()
k = Thread(target = ghost , args = ["example2@gmail.com"])
k.daemon = True
k.start()

我收到此错误（仅最后一行）：

anaconda3\lib\smtplib.py", line 560, in data
    raise SMTPDataError(code, repl)
smtplib.SMTPDataError: (250, b'2.0.0 OK  1591234004 l1sm6645685wrb.31 - gsmtp')