How to Send Email with Django via SMTP

import os
from django.conf import settings
from django.core.mail import send_mail
settings.configure(
    EMAIL_BACKEND="django.core.mail.backends.smtp.EmailBackend",
    EMAIL_HOST="send.ahasend.com", EMAIL_PORT=587, EMAIL_USE_TLS=True,
    EMAIL_HOST_USER=os.environ["SMTP_USERNAME"],
    EMAIL_HOST_PASSWORD=os.environ["SMTP_PASSWORD"], EMAIL_TIMEOUT=10,
)
count = send_mail("Django sandbox test", "Hello from AhaSend",
                  os.environ["AHASEND_FROM"], ["recipient@example.com"],
                  fail_silently=False)
if count != 1:
    raise RuntimeError("Email was not accepted")
print("Accepted by SMTP")

import os
EMAIL_BACKEND = "django.core.mail.backends.smtp.EmailBackend"
EMAIL_HOST = "send.ahasend.com"
EMAIL_PORT = 587
EMAIL_USE_TLS = True
EMAIL_USE_SSL = False
EMAIL_HOST_USER = os.environ["SMTP_USERNAME"]
EMAIL_HOST_PASSWORD = os.environ["SMTP_PASSWORD"]
EMAIL_TIMEOUT = 10
DEFAULT_FROM_EMAIL = os.environ["AHASEND_FROM"]

import os, sys
import django
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "mail_settings")
django.setup()
from django.conf import settings
from django.core.mail import EmailMultiAlternatives

def send_welcome(recipient):
    message = EmailMultiAlternatives("Your account is ready", "Welcome to your account.",
                                    settings.DEFAULT_FROM_EMAIL, [recipient])
    message.attach_alternative("<p>Welcome to your account.</p>", "text/html")
    if message.send(fail_silently=False) != 1:
        raise RuntimeError("Email was not accepted")

if __name__ == "__main__":
    try:
        send_welcome(os.environ["AHASEND_TO"])
        print("Accepted by SMTP")
    except Exception:
        print("Email failed; check the job and SMTP settings.", file=sys.stderr)
        sys.exit(1)