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

msg = MIMEMultipart('alternative')
msg['Subject'] = 'An example email'
msg['From'] = '[email protected]'
msg['To'] = '[email protected]'

part1 = MIMEText("Hello!", 'plain')
part2 = MIMEText("<h1>Hello!</h1>", 'html')

msg.attach(part1)
msg.attach(part2)

# Send the message via our own SMTP server.
s = smtplib.SMTP('localhost', port=0)
s.send_message(msg)
s.quit()

from redmail import EmailSender

email = EmailSender(host="localhost", port=0)

email.send(
    subject="An example email",
    sender="[email protected]",
    receivers=['[email protected]'],
    text="Hello!",
    html="<h1>Hello!</h1>"
)