OpenBSD has a nice feature called httpd chroot. The impact of this is that httpd creates a jail in /var/www/ for the httpd server. This means that all libraries that httpd uses must be accessible from within the jail. This means we could copy everything that qmailadmin, vpopmail, vqadmin and squirrelmail uses into /var/www/, or just turn off the chroot. It's not so secure to run it without the chroot, but I've not seen a bug in the OpenBSD webserver for some time, so let's just get on with it.

vi /etc/rc.conf

change 
httpd_flags=NO

to

httpd_flags="-u"

Now lets compile vqadmin

cd /downloads/qmailrocks/
tar zxvf vqadmin-2.3.6.tar.gz
cd vqadmin-2.3.6
./configure --enable-cgibindir=/var/www/cgi-bin  --enable-htmldir=/var/www/htdocs
     
configure should report something similar to this:

            Current settings
---------------------------------------
vpopmail directory = /home/vpopmail
               uid = 1008
               gid = 1003
       cgi-bin dir = /var/www/cgi-bin
       vqadmin dir = /var/www/cgi-bin/vqadmin
    mysql features = disabled

If this is the case lets get on with the compile

make && make install-strip

We must now add the vqadmin directive to Apache and create a htpasswd file.

vi /var/www/conf/httpd.conf

<Directory "/path/to/your/cgi-bin/vqadmin">
deny from all
Options ExecCGI
AllowOverride AuthConfig
Order deny,allow
</Directory>

cd /path/to/your/cgi-bin/vqadmin

Now you will want to create a .htaccess file to password protect the Vqadmin interface. There should already be a .htaccess file in the vqadmin directory, so all you need to do is configure it.

vi .htaccess

AuthType Basic
AuthUserFile /path/to/where/you/want/to/store/the/password/file/.htpasswd
AuthName vQadmin
require valid-user
satisfy any

htpasswd -bc /path/to/where/you/want/to/store/the/password/file/.htpasswd admin admin_password

chmod 644 /path/to/where/you/want/to/store/the/password/file/.htpasswd

When you go to http://localhost/cgi-bin/vqadmin/vqadmin.cgi you should get a login box. Just login with the htpasswd settings you used earlier and you should get a nice blue screen.