[Pkg-exim4-users] Compiling Exim4 from source for Domainkeys

[Magnus Holmgren]

On Saturday 20 January 2007 02:50, mark david mcCreary wrote:
> I have found an unofficial domain keys library for Debian at
>
> 	http://www.kibibyte.se/download/debian/

That would be me who is to blame. :-)

> There seems to be a license issue, and I'm not sure why Yahoo is
> making things difficult if they want us to sign email going to
> them.  Any license fees somebody would pay pale in comparasion
> to reducing spam costs for them.

Well, the issues are mainly 1) that the license isn't DFSG compliant and 2) 
that it's unclear whether the library can be packaged using the word 
domainkeys in the package name. Yahoo *probably* isn't going to make things 
difficult to anyone, but Debian wants to be sure in order to distribute a 
package.

> I can get libdomainkeys0_0.68-1_i386.deb installed, but I don't
> know how to figure out where it went.
>
> I need to know where it went to give me some chance of adjusting
> the CLFLAGS and LDFLAGS statements, that I need to add to the
> Local/Makefile.

You also need to install the -dev package to build programs using the library.

I was meaning to include a .pc file containing the necessary compiler and 
linker flags in a future version. Since the header files are installed 
in /usr/include and the .so file in /usr/lib, you only need

EXPERIMENTAL_DOMAINKEYS=yes
LDFLAGS += -ldomainkeys

> What Debian command would show me where a package gets installed
> at ?

In general you can see what files a Debian package contains by running

$ dpkg -L package

after installing it, or

$ dpkg -c packagefile.deb

before installing it.

> p.s.  Or are we supposed to be using DKIM instead of Domainkeys ?

DomainKeys has been superseded by DKIM, which differs from DK in certain ways, 
dealing with some shortcomings of DK (for example, DK requires that the 
Sender field be changed if a message needs to be re-signed), but Yahoo still 
only uses DK.

-- 
Magnus Holmgren        holmgren at lysator.liu.se
                       (No Cc of list mail needed, thanks)

  "Exim is better at being younger, whereas sendmail is better for 
   Scrabble (50 point bonus for clearing your rack)" -- Dave Evans
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