Changes to Send Draft

added the pattern ^(?:[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}|(?:sub)_(?:[0-7][0-9abcdefghjkmnpqrstvwxyz]{25}|[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}))$ to the request property subscribers/anyOf[subschema #1]/items

added the non-success response with the status 422

added the non-success response with the status 429

the code response's property type changed from no type to string for status 400

the code response's property type changed from no type to string for status 403

the code response's property type changed from no type to string for status 404

the endpoint scheme security ApiKeyAuth was added to the API

the endpoint scheme security PermissionAuthenticationRequirement was removed from the API

api tag Emails added

request property recipients list-of-types was widened by adding types null to media type application/json

request property subscribers list-of-types was widened by adding types null to media type application/json

added the non-success response with the status 401

for the path request parameter id, the format was generalized from uuid to no format

the subscribers/items request property format was generalized from uuid to no format

the endpoint scheme security PermissionAuthenticationRequirement was added to the API

the endpoint scheme security AuthenticationRequirement was removed from the API