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Sender Rewriting Scheme in Python

This web page is written by Stuart D. Gathman
sponsored by Business Management Systems, Inc.
Last updated Jul 31, 2006

This is a Python implementation of the Sender Rewriting Scheme. It is a fairly direct translation of the draft implementation in Perl by Shevek. It includes a test suite, which currently checks four levels of forwarding and subsequent reversal for the Guarded, DB, and Reversible implementations.

Sendmail integration

Add the following lines to your /etc/mail/ (RedHat / Fedora) after any MAILER():
dnl #
dnl # File listing domains we do not SRS encode for when sending to
dnl #
dnl #
dnl # Uncomment the following if you do not wish to SRS encode mail from
dnl # local domains.  Only non-local domains need to be SRS encoded to
dnl # satisfy SPF.  But encoding all outgoing mail can detect bounce forgeries.
dnl #
dnl define(`NO_SRS_FROM_LOCAL')dnl
dnl #
If you cannot install a version of sendmail with socketmap support, then the original program map is still available as HACK(pysrsprog).


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