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Re: What do all these options mean?

From: Joe Maimon
Subject: Re: What do all these options mean?
Date: Thu, 24 Feb 2005 16:58:39 -0500
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8b) Gecko/20050208 MultiZilla/

Dan Nelson wrote:

2.  What does the confMILTER_MACROS_CONNECT line do?

The MILTER_MACROS_* variables tell sendmail which macro values it is
allowed to send to milters.  Specifically, the "b" macro is what
spamass-milter is looking for. The rest are sendmail's default values. I have no idea why sendmail defaults to just a few permitted macros; I
think it should default to letting milters query any value.

I can think of two possible reasons.

1) Sendmail sends all macro values its configured to send to the milter before each command. The milter does not actually query the sendmail proccess. A milter cannot change a macro value.
(there are patches whereby a milter can do that)

2) This is a bit more dubious: Potential information leakage. All though they can in current milter implementation do much worse things to your email. (patches exist which can prevent a milter from rejecting email).

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