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.
What is the difference between a hostname and a domain name. If you are wondering what the difference is between a hostname (or host name) and a domain name, you're on the right page. This document answers the question once and for all and most importantly, is an accurate answer. For those that need to ask this question without needing to become a DNS administrator, a hostname is a specific name pointing to a specific host. It doesn't matter if its 1, 2, 3 or even 63 levels deep. A hostname could be bob, bob.com, bob.bobsdomain.com, bob.accounting.bobsemployer.com and so on. The point is that its a name used to refer to a specific host.