The guidelines for domain names of an email address are that it has to match the hostname and must use hyphens and dots. The name must use letters and or digits.
ping hostname or nslookup hostname For more details: http://www.zilckh.com/how-to-find-ip-address-from-hostname-in-a-windows-system-using-command-line/
The hostname (the name of the computer) can be found in most Linux distributions by issuing the hostname command without arguments. Alternatively, you can view the contents of /etc/hosts. The hostname will be listed next to the IP address 127.0.1.1.
The A RECORD is the record that points a domain name to an IP. The MX RECORD is the record that points the email for a domain to mailserver hostname.
no hostname
ping [hostname] or ping [IP address]For example:ping wiki.answers.comorping 127.0.0.1
hostname.
To ping a host 1,000 times, you can use the command line in your operating system. On Windows, open Command Prompt and type ping -n 1000 [hostname or IP address], replacing [hostname or IP address] with the target you want to ping. On Linux or macOS, use the command ping -c 1000 [hostname or IP address]. This will send 1,000 echo requests to the specified host.
on the very right hand side of your hotmail account you will see a button "options" this will give you a menu, at the bottom of this menu there is an option " more options" This will lead you to a page an there you will find a section called "Junk Email" in this section there is a subsection called "safe and blocked Senders" if you go into this section you will see a small section called "blocked Senders" in here you can add the address of anyone you want to block
Router(config)# hostname AdminAdmin(config)# enable secret cangetinAdmin(config)# interface fa0/1Admin(config-if)#ip address 192.168.1.22 255.255.255.248Router(config)# hostname AdminAdmin(config)# enable password cangetinAdmin(config)# interface fa0/1Admin(config-if)# ip address 192.168.1.22 255.255.255.248Router(config)# hostname AdminAdmin(config)# enable secret cangetinAdmin(config)# interface fa0/0Admin(config-if)# ip address 192.168.1.22 255.255.255.248Router(config)# hostname AdminAdmin(config)# enable password cangetinAdmin(config)# interface fa0/0Admin(config-if)# ip address 192.168.1.22 255.255.255.248
i have no email address.
With the following command: No hostname