Creates the requirements.

README.md

+# Email system for libre.sh
+
+As a user I want:
+ - to use SSO to login to the webUI (management and webmail)
+ - to be able to generate an app password to connect to non web
+ - to manage my emails
+ - to manage my aliases
+ - to manage my quotas
+ - manage my sieve rules
+ - get a good spam filter
+
+As an accountant, I want:
+ - to receive a webhook on email creation and deletion
+ - to receive a webhook on quota change
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