Email bounce detectors.
The flufl.bounce library provides a set of heuristics and an API for detecting the original bouncing email addresses from a bounce message. Many formats found in the wild are supported, as are VERP and RFC 3464 (DSN).
flufl.bounce is Copyright (C) 2004-2017 Barry Warsaw <email@example.com>
Licensed under the terms of the Apache Software License, version 2. See LICENSE for details.