Microservice which store blacklisted emails.
GET /blacklist - all emails response
GET /blacklist/email@email.em - is or not in blacklist
POST /blacklist - add JSON {"email": "@email.at", "status": "string", "clientID": "1"}
PUT /blacklist - add multiply JSON {"emails": ["@email.at"], "status": "string", "clientID": "1"}
DELETE /blacklist/email@email.em - delete from blacklist
Clientid:{string} have to be in header for all request. POST and PUT using JSON clientID when creating db record.