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

SMTP_HOST = "smtp.example.com"
SMTP_PORT = 587
SMTP_USERNAME = "your_username"
SMTP_PASSWORD = "your_password"
SMTP_STARTTLS = True

sender = "sender@example.com"
recipient = "recipient@example.com"
subject = "Test Email"
message = "This is a test email."

msg = MIMEMultipart()
msg["From"] = sender
msg["To"] = recipient
msg["Subject"] = subject
msg.attach(MIMEText(message))

smtp = smtplib.SMTP(SMTP_HOST, SMTP_PORT)
smtp.ehlo()
if SMTP_STARTTLS:
    smtp.starttls()
    smtp.ehlo()
if SMTP_USERNAME and SMTP_USERNAME:
    smtp.login(SMTP_USERNAME, SMTP_PASSWORD)

smtp.sendmail(sender, recipient, msg.as_string())
smtp.quit()