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from django.conf import settings
from django.core.checks import Error, Tags, Warning, register
from django.core.mail import DEFAULT_MAILER_ALIAS
@register(Tags.mail)
def check_mailers_default_alias(app_configs, **kwargs):
if not settings.is_overridden("MAILERS"):
return []
if DEFAULT_MAILER_ALIAS in settings.MAILERS:
return []
if settings.MAILERS:
hint = (
f"Add a '{DEFAULT_MAILER_ALIAS}' entry to MAILERS, or pass 'using' when "
"sending email."
)
else:
hint = f"Add a '{DEFAULT_MAILER_ALIAS}' entry to MAILERS."
return [
Warning(
f"Your MAILERS setting has no '{DEFAULT_MAILER_ALIAS}' entry. Sending "
"email without a valid mailer will fail.",
hint=hint,
id="mail.W001",
)
]
NON_PRODUCTION_EMAIL_BACKENDS = {
"django.core.mail.backends.console.EmailBackend",
"django.core.mail.backends.dummy.EmailBackend",
"django.core.mail.backends.filebased.EmailBackend",
"django.core.mail.backends.locmem.EmailBackend",
}
@register(Tags.mail, deploy=True)
def check_mailers_production_backend(app_configs, **kwargs):
try:
backend = settings.MAILERS[DEFAULT_MAILER_ALIAS]["BACKEND"]
except (AttributeError, KeyError):
# There is no "default" backend to inspect: either MAILERS is not
# defined, or there is no "default" entry, or no "BACKEND" key in it.
# An omitted BACKEND defaults to SMTP, which is fine.
return []
if backend not in NON_PRODUCTION_EMAIL_BACKENDS:
return []
return [
Error(
f"Your MAILERS setting uses a development-only email backend in the "
f"'{DEFAULT_MAILER_ALIAS}' entry ({backend}).",
hint=(
"Use a production-ready email backend, such as the SMTP backend, "
"otherwise email will not be sent."
),
id="mail.E001",
)
]
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