[#717] Document no emails being sent if templates not configured #1997

Job	Run time
Run the Django test suite	2m 20s
Build and check documentation	1m 4s
Build frontend	1m 12s
Build docker image (dev, -dev, dev) / Build image	1m 59s
Build docker image (production, docker) / Build image	1m 56s
End-to-end tests, firefox	7m 52s
End-to-end tests, webkit	6m 31s
End-to-end tests, chromium	6m 42s
Run storybook tests	3m 3s
Push Docker image	0s
Run the Django test suite	2m 20s
End-to-end tests, webkit	6m 26s
End-to-end tests, firefox	8m 7s
Build and check documentation	1m 4s
Build docker image (dev, -dev, dev) / Build image	1m 59s
Build frontend	1m 12s
End-to-end tests, chromium	6m 42s
Run storybook tests	3m 3s
Build docker image (production, docker) / Build image	1m 56s
Push Docker image	0s
Build frontend	1m 12s
Build and check documentation	1m 4s
End-to-end tests, firefox	8m 4s
End-to-end tests, chromium	6m 42s
Run the Django test suite	2m 20s
End-to-end tests, webkit	6m 26s
Run storybook tests	3m 3s
Build docker image (dev, -dev, dev) / Build image	1m 59s
Build docker image (production, docker) / Build image	1m 56s
Push Docker image	0s
	1h 38m 14s

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