Hello, wildwind, you wrote: vsb>> On all canons I should invent any artificial hostname a type myserver.vasya.ru. W> On what such canons? Give the reference. Here, for example. Take a config postfix, there is myhostname, there are mydomain, on a default they different and on all - too. Yes in any arguings it mention that a pier mail should be adjusted through a subdomain, instead of through the domain. Well and basically hammer a command hostname and hostname - domain and you will see that it is different concepts, there is a domain (it that normally understand as the domain, that is the domain of the second level), and is hostname which is in this domain and what for it is all it is necessary - not clearly. Why there is no simply a domain? If the separate server for something is necessary to me, I will get a subdomain, is not necessary, means is not necessary.