Отредактируйте файл settings.py:
EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend'
EMAIL_HOST = 'smtp.fmailer.ru'
EMAIL_PORT = 8025
EMAIL_HOST_USER = 'your_username'
EMAIL_HOST_PASSWORD = 'your_password'
EMAIL_USE_TLS = False
EMAIL_USE_SSL = False
DEFAULT_FROM_EMAIL = 'your_from_email_address'
Для тестирования отправки почты:
from django.core.mail import send_mail
send_mail(
'Subject',
'Message body',
'from@example.com',
['to@example.com'],
fail_silently=False,
)