python-send-valid-mail-to-mail-tester-dot-com.py

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

message = MIMEMultipart('alternative')
message['From'] = 'Sender Name <${USER}@${DOMAIN}>'
message['To'] = 'Receiver Name <${TO}>'
message['Subject'] = 'Any subject'
message['Message-Id'] = email.utils.make_msgid()
message['Date'] = email.utils.formatdate(timeval=None, localtime=False, usegmt=False)

message.attach(MIMEText('# A Heading\nSomething else in the body', 'plain'))
message.attach(MIMEText('<h1 style="color: blue">A Heading</a><p>Something else in the body</p>', 'html'))



server = smtplib.SMTP('mail.${DOMAIN}:587')
server.starttls()
print(
  server.login('${USER}@${DOMAIN}', '${PASSWORD}')
)
print(
  server.sendmail(
    '${USER}@${DOMAIN}',
    "${TO}>",
    message.as_string()
  )
)
server.quit()