On Mon, 4 Aug 2008, Alan Halachmi wrote:
> Looking through the conversation today with Jim Maloney, it would
> seem that the issue I describe below is fixable either with a second MTA
> or proper use of _FRR_REPLACE_RULES. I've compiled in the
> _FRR_REPLACE_RULES option, but I wasn't able to find documentation on
> how to invoke it.
FFRs (For Future Release features) are undocumented deliberately, because
I don't want to provide something and then remove it later if it's decided
that the feature was a bad idea.
When you compile with _FFR_REPLACE_RULES, you add a new configuration file
option called ReplaceRules. This names a file which should contain
entries of the form:
regexp <TAB> string
(Blank lines are ignored, and the "#" character denotes the beginning of a
comment which is also ignored.)
Then, anywhere there's text matching "regexp" in the value of any header
field in the message, that text will be replaced by "string". So if your
file contains:
host\.example\.com <TAB> example.com
...then this:
From: [EMAIL PROTECTED]
...will be canonicalized as:
From: [EMAIL PROTECTED]
You can have any number of lines in the ReplaceRules file you create. The
rules are all applied in order to each header field as it arrives. That
means more than one rule can match, so if your ReplaceRules file contains:
X <tab> Y
Y <tab> Z
...then all Xs will be changed to Ys, and then all Ys will be changed to
Zs. However, in the opposite order, you'd get a different result.
(Note that I've exaggerated the spaces in the lines for illustration
reasons; the actual lines would look like:
X Y
Y Z
...and those are single tabs, not seven spaces, in between the two fields
on each line.)
This is currently done in both signing and verifying mode, but I'm pretty
sure I want to change it so it only applies in signing mode.
Let me know if you have any further questions.
-MSK
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