Mailfromd Manual (split by node):   Section:   Chapter:FastBack: Intro   Up: Intro   FastForward: Building   Contents: Table of ContentsIndex: Concept Index

1.5 SPF

Sender Policy Framework, or SPF for short, is an extension to SMTP protocol that allows to identify forged identities supplied with the MAIL FROM and HELO commands. The framework is explained in detail in RFC 4408 (http://tools.ietf.org/html/rfc4408) and on the SPF Project Site.

Mailfromd provides a set of functions (see SPF Functions) for using SPF to control mail flow.