Send email from Django over SMTP

# built in — django.core.mail

# settings.py
import os

EMAIL_BACKEND = "django.core.mail.backends.smtp.EmailBackend"
EMAIL_HOST = os.environ.get("SMTP_HOST", "smtp.queensmtp.com")
EMAIL_PORT = int(os.environ.get("SMTP_PORT", "587"))
EMAIL_USE_TLS = EMAIL_PORT == 587        # STARTTLS
EMAIL_USE_SSL = EMAIL_PORT == 465        # implicit TLS — never set both True
EMAIL_HOST_USER = os.environ["SMTP_USER"]
EMAIL_HOST_PASSWORD = os.environ["SMTP_PASS"]
EMAIL_TIMEOUT = 20
DEFAULT_FROM_EMAIL = "Your App <hello@yourdomain.com>"
SERVER_EMAIL = "alerts@yourdomain.com"   # for error mails to ADMINS

# anywhere
from django.core.mail import send_mail, EmailMultiAlternatives

send_mail("Your receipt", "Thanks for your order #1042",
          None, ["customer@example.com"])         # None = DEFAULT_FROM_EMAIL

msg = EmailMultiAlternatives("Your receipt", "Thanks for your order #1042",
                             None, ["customer@example.com"])
msg.attach_alternative("<h1>Thanks for your order</h1><p>#1042 is confirmed.</p>", "text/html")
msg.send()

# development: print instead of sending
# EMAIL_BACKEND = "django.core.mail.backends.console.EmailBackend"