Improper folded header

Simon Brereton simon.brereton at
Thu Apr 19 16:46:52 CEST 2012


Lately I've been getting a lot of these..

Return-Path: <jaxbar at>
Delivered-To: bad-header-quarantine
X-Envelope-From: <jaxbar at>
X-Envelope-To: <pj at>
X-Quarantine-ID: <x9ylzx+MCHZB>
X-Amavis-Alert: BAD HEADER SECTION Improper folded header field made up
        entirely of whitespace (char 09 hex): Subject:
X-Spam-Flag: NO

Does anyone know which/what client causes this, and how?  What is the
potential exploitable value of this?  I.e. if I set amavis to ignore
this, what risk do I run (even highly theoretical).



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