Noun. 1. achromatic color-a color lacking hue; white or grey or black. achromatic colour. color, coloring, colouring, colour-a visual attribute of things that results from the light they emit or transmit or reflect; a white color is made up of many different wavelengths of light.
A good candidate for a mail host is a system that connects your systems to the outside world or to a parent domain. 1  Become superuser on the mail host system. 2  Verify the host name configuration. 3  Update. Create an entry for the new mail host in the appropriate hosts file.  Change the correct configuration 1  file. Restart and test your mail configuration.
One common way to resolve a host name to an IP address is to use a locally stored database file that contains IP-address-to-host-name mappings. On most UNIX systems, this file is /etc/hosts. On Windows 2000 systems, it is the Hosts file in the \% SystemRoot %\system32\drivers\etc directory.ost Name Resolution. A host name is an alias assigned to an IP node to identify it as a TCP/IP host. The host name can be up to 255 characters long and can contain alphabetic and numeric characters and the - and . characters.