python - Django not sending error emails - how can I debug?

Question

I'm using Django 1.8. This is my base settings file:

LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'filters': {
        'require_debug_false': {
            '()': 'django.utils.log.RequireDebugFalse'
        }
    },
    'handlers': {
        'mail_admins': {
            'level': 'ERROR',
            'filters': ['require_debug_false'],
            'class': 'django.utils.log.AdminEmailHandler'
        }
    },
    'loggers': {
        'django.request': {
            'handlers': ['mail_admins'],
            'level': 'ERROR',
            'propagate': True,
        },
    }
}
ADMINS = (
   ('ME', '[email protected]'),
)
MANAGERS = ADMINS

And these are my production settings:

########## EMAIL CONFIGURATION
EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend'
EMAIL_USE_TLS = True
EMAIL_HOST = 'smtp.gmail.com'
EMAIL_PORT = 587
EMAIL_HOST_USER = '[email protected]'
EMAIL_HOST_PASSWORD = utils.get_env_setting('GMAIL_PASS')
EMAIL_SUBJECT_PREFIX = '[%s] ' % SITE_NAME
SERVER_EMAIL = EMAIL_HOST_USER
DEFAULT_FROM_EMAIL = EMAIL_HOST_USER
########## END EMAIL CONFIGURATION

It used to send error email in production, but has stopped. I've set up a page that returns 500 errors so that I can test this further - no emails being sent when I load it.

I've tried debugging the obvious things:

I can still log into [email protected] and it doesn't seem to have been blocked.
I've checked my spam filter.
I'm certain that DEBUG is set false.
I believe the GMAIL_PASS environment variable is available to the Django user.

How can I debug this further?

First, check that mails are being sent. Set the HOST to localhost, the PORT to 1025, disable TLS and run a dummy SMTP server using this command: python -m smtpd -n -c DebuggingServer localhost:1025 — zopieux
In case it helps anyone, it took me a while to figure out that you not only have to specify the mail_admins under the handlers key, but you also have to enable that handler under the loggers key — Alex Petralia

raratiru raratiru · Accepted Answer · 2016-09-09T21:05:30

For the debugging part of the question

@zopieux commented:
First, check that mails are being sent. Set:
```
EMAIL_HOST = 'localhost'
EMAIL_PORT = 1025
EMAIL_USE_TLS = False
EMAIL_USE_SSL = False
```
Then run a dummy SMTP server:

python -m smtpd -n -c DebuggingServer localhost:1025
If this works, you can revert the changes and manually send an email as described in this relevant question:
```
from django.core.mail import EmailMessage
email = EmailMessage('Hello', 'World', to=['[email protected]'])
email.send()
```
For the feature of using Google as SMTP server:

The most popular -and updated- answer of the question states that Google does not support anymore this feature (2016) and that you should try to find another SMTP server.

I have posted my working logging configuration for reference.

python - Django not sending error emails - how can I debug?

1 Answers