This PR add Inbound Email integration.
It designed to support some variety of ESPs, but in prod we will use
Mailgun, so locally I tested it only with mailgun ESP.
**Important:**
To make it work on different clusters I'm planning to provide different
email domains for different regions, like ....@us.oncall.grafana.net,
...@eu.oncall.grafana.net
---------
Co-authored-by: Innokentii Konstantinov <innokenty.konstantinov@grafana.com>
# What this PR does
Emails fails if the alert title has a newline char
## Which issue(s) this PR fixes
Grafana tickets : 81244
## Checklist
- [x] Tests updated
- [x] `CHANGELOG.md` updated
---------
Co-authored-by: Vadim Stepanov <vadimkerr@gmail.com>
# What this PR does
This PR adds
[django-migration-linter](https://github.com/3YOURMIND/django-migration-linter)
to keep database migrations
backwards compatible
- we can automatically run migrations and they are zero-downtime, e.g.
old code can work with the migrated database
- we can run and rollback migrations without worrying about data safety
- OnCall is deployed to the multiple environments core team is not able
to control
See [django-migration-linter
checklist](https://github.com/3YOURMIND/django-migration-linter/blob/main/docs/incompatibilities.md)
for the common mistakes and best practices
## Which issue(s) this PR fixes
## Checklist
- [ ] Tests updated
- [ ] Documentation added
- [ ] `CHANGELOG.md` updated
---------
Co-authored-by: Joey Orlando <joey.orlando@grafana.com>
* DEFAULT_FROM_EMAIL -> EMAIL_FROM
* add EMAIL_FROM live setting
* EMAIL_FROM -> EMAIL_FROM_ADDRESS
* merge dev
* add test for get_from_email
* allow live settings to be null on internal API
* remove redundant tests
* remove email verification related code
* remove email verification related code
* remove sendgrid callback
* remove sendgrid related code
* remove sendgrid related code
* rename sendgrid app to email
* remove email from built-in channels
* remove email from built-in channels
* remove email from built-in channels
* add email backend: https://github.com/grafana/oncall/pull/50
* add email templater
* add email templater
* convert md to html
* add email settings to live settings
* use task to send email, handle some exceptions to create logs
* remove ERROR_NOTIFICATION_MAIL_DELIVERY_FAILED usage
* add email limit logic
* fix tests
* add docs
* remove old email templates
* remove old email templates
* add template_fields to messaging backend
* add messaging backends templates to public api
* add comment for deprecated fields
* fix test
* fix tests
* disable email by default
* don't retry on SMTPException and TimeoutError
* add tests
* bring email back to public api docs
* return ERROR_NOTIFICATION_MAIL_LIMIT_EXCEEDED
* make template_fields tuple
* build_subject_and_title -> build_subject_and_message
* add one more comment about template deprecation
* use 8 as backend id
* add comment about gaierror and BadHeaderError
* add comment on importing in notify_user_async
* edit oss docs
