批量CSV电子邮件无错误，不发送电子邮件

Question

因此，我需要通过工作发送大量电子邮件，并认为我会制作一个快速的python脚本来帮助我。它似乎以前曾经起作用，但现在不再起作用。

我仍然可以发送电子邮件，因此不会被列入黑名单。香港专业教育学院试图将收件人/发件人更改为无效。

import smtplib
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart
import csv

email_user = 'ronchik4444@gmail.com'
email_pass = input("Pasword:... ")
email_recip = 'ronb@mrkt365.com'
subject = "Hey, let's test?"

#creates a new multipart object and fills parameters
msg = MIMEMultipart()
msg['From'] = email_user
msg['To'] = email_recip
msg['subject'] = subject

#defines the message
body = "READ"

#attaches body to email
msg.attach(MIMEText(body, 'plain'))

#converts email object above to plain text format
text = msg.as_string()

#initizling server ('gmail smtp server', port# )
server = smtplib.SMTP('smtp.gmail.com',587)

#initizlizez a secure connection
server.starttls()

# logs in ('email', 'password')
server.login(email_user, email_pass)


with open ("contacts_file.csv") as file:
    reader = csv.DictReader(file)
    next(reader)
    for row in reader:
        Server.sendmail(email_user,email_recip,text)


print ('done')

#closes connection
server.quit()

没有错误消息，当我检查收件人收件箱时没有电子邮件。