SSLCertVerificationError when sending emails after 1.3.52 upgrade (from 1.3.45)

[renrutmas]

What went wrong?

What happened:
Cannot send emails after upgrade due to SSLCertVerificationError

What did you expect to happen:
Send email as in previous version

How do we reproduce it?

1. Upgrade to 1.3.52 from 1.3.45
2. Try and send an email from an escalation chain

2023-11-14 13:59:58,790 source=engine:celery worker=ForkPoolWorker-3 task_id=f0b12540-fe54-45b0-b769-d3578678d035 task_name=apps.email.tasks.notify_user_async name=celery.app.trace level=INFO Task apps.email.tasks.notify_user_async[f0b12540-fe54-45b0-b769-d3578678d035] retry: Retry in 1s: SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1002)')

Probably because of this - https://medium.com/@hhuysamen/sending-emails-using-django-4-2-3e5de1ff64dc

Seems Django was updated as of 1.3.48 - c4fb620#diff-a702a33c7a611fc83dcc7c2838f2607f00db74d8567ef55bbca2b703a7544559

Grafana OnCall Version

v1.3.52

Product Area

Alert Flow & Configuration

Grafana OnCall Platform?

Kubernetes

User's Browser?

No response

Anything else to add?

No response

[joeyorlando]

Hi there!

Please try setting the EMAIL_USE_TLS engine environment variable to False (as stated in the Medium article you linked).

I'll go ahead and close this. If that does not work, feel free to reopen!