As a developer, I'd like to use a task queue to handle sending notification emails

[riatzukiza]

Description:

Follow on to #1784
After validating the network settings allowing us to send emails from cloud.gov, we decided not to implement it as a django view, but in a celery task.

Will require functioning celery service to implement this ticket correctly

Acceptance Criteria:
Create a list of functional outcomes that must be achieved to complete this issue

• Emails are sent from a task queue asynchronously and do not block our django process
• Testing Checklist has been run and all tests pass
• README is updated, if necessary

Tasks:
Create a list of granular, specific work items that must be completed to deliver the desired outcomes of this issue

• Create a class/set of functions for sending emails through the task queue
• Run Testing Checklist and confirm all tests pass

Notes:
Add additional useful information, such as related issues and functionality that isn't covered by this specific issue, and other considerations that will be helpful for anyone reading this

Supporting Documentation:

https://docs.djangoproject.com/en/4.0/topics/email/
https://docs.djangoproject.com/en/4.0/ref/settings/#std-setting-EMAIL_USE_SSL
https://docs.djangoproject.com/en/dev/ref/templates/api/#loading-a-template

from django.core.mail import send_mail

send_mail(
    'Subject here',
    'Here is the message.',
    'from@example.com',
    ['to@example.com'],
    fail_silently=False,
)

Open Questions:
Please include any questions or decisions that must be made before beginning work or to confidently call this issue complete

• Open Question 1
• Open Question 2