[Mimedefang] what are the different headers possible?

[Steffen Kaiser]

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On Thu, 21 Apr 2011, fakessh wrote:

Hi fakessh,

please keep in mind that MIMEDefang bases on a complete programming 
language with plenty of modules. You need to learn this language in order 
to get the configuration work in a production environment properly.

> changes made ​​without any result: here is my code
>
>                my $gi = Geo::IP->open("/usr/share/GeoIP/GeoIP.dat",
> GEOIP_STANDARD);
>                my ($country, $region) = $gi->region_by_name($RelayAddr);
>                action_add_header("X-Header-Country", "$country");
>                action_add_header("X-Header-Region", "$region");

I don't use Geo::IP either (as Joseph Brennan), but I refer to the doc on 
http://search.cpan.org/~borisz/Geo-IP-1.38/lib/Geo/IP.pm

citate:

"
( $country, $region ) = $gi->region_by_addr('24.24.24.24');
Returns a list containing country and region. If region and/or country is 
unknown, undef is returned. Sure this works only for region databases.
( $country, $region ) = $gi->region_by_name('www.xyz.com');
Returns a list containing country and region. If region and/or country is 
unknown, undef is returned. Sure this works only for region databases.
"

Things to consider to get the code going:

1) MIMEDefang only knows the numerical IP the connection comes from, the 
symbolical name stems from reverse DNS lookups, hence, I would never use 
region_by_name() personally, but stick to region_by_addr(). Otherwise you 
need to know how region_by_name() behaves, if you pass it "[a.b.c.d]" 
symbolical names for IPs, that does not resolve.

2) region and country may be undef, hence, you ought to handle the case 
the function does not return defined values.

3) open() may fail, too, you ought to handle that case as well.

Regards,

- -- 
Steffen Kaiser
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