Overview
This document describes features that require Postfix version 2.0 or later.
Topics covered in this document:
- What is backscatter mail?
- How do I block backscatter mail to random recipient addresses?
- How do I block backscatter mail to real recipient addresses?
The examples use Perl Compatible Regular Expressions (Postfix pcre: tables), but also provide a translation to POSIX regular expressions (Postfix regexp: tables). PCRE is preferred primarily because the implementation is often faster. Continue reading “Postfix Backscatter Howto”