Apache-2.0
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Copyright 2015 Message Systems, Inc. or its affiliates. All Rights Reserved. Licensed under the Apache License, Version 2.0 (the "License"). You may not use this software except in compliance with the License. A copy of the License is located at http://www.apache.org/licenses/LICENSE-2.0.html or in the "license" file accompanying this software. This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
Source: github.com/eluleci/gosparkpost@v0.0.0-20161115175732-28924903d1d3/LICENSE