Email abuse rates can significantly affect a sender’s reputation and, consequently, its ability to deliver customers’ emails to the inbox. This paper explains some of the common processes senders can use to effectively manage and monitor email complaints and to help their customers, who are the list owners, develop healthy email practices that generate better results.
of email lists.

This document covers best practices on how to properly construct and maintain an SPF record, common errors and some unintended consequences.  It is targeted at those with a basic understanding of the purpose and usage of SPF.