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Qmail: nullenvsender patch
nullenvsender patch for qmail+starttls+smtp-auth
Charles Cazabon wrote this patch to modify qmail-smtpd to refuse messages from
the null envelope sender if they have more than one envelope recipient.
This is a trick to keep people from sending mass spam mails, emulating bounce
messages.
All we did was modify this patch so that it could be applied to a qmail
source tree that had already been patched for TLS and smtp-auth.
Download:
ftp://ftp.vectorstar.net/pub/qmail-old/modified/smtpssl-nullenvsender.patch
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