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wilma@mail:~$ sudo -i
[sudo] password for wilma: 
...
Mail queue is empty
root@mail:~#

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root@mail:~# vi /etc/hosts
...
192.168.12.1 mail.merrillpjensen.com mail
...

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127.0.1.1 mail.merrillpjensen.com mail 
192.168.12.1 mail.merrillpjensen.com mail

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root@mail:~# vi /etc/aliases
root@mail:~# cat /etc/aliases
# See man 5 aliases for format
...
# See man 5 aliases for format
postmaster:    sammy
root: sammy

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root@mail:~# host -t MX www.merrillpjensen.com
www.merrillpjensen.com mail is handled by 5 mail.merrillpjensen.com.
root@mail:~#

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root@mail:~# man hostname
root@mail:~# hostname -f
mail.merrillpjensen.com
...
merrillpjensen.com
root@mail:~#

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root@mail:~# cat /etc/bash.bashrc
# System-wide .bashrc file for interactive bash(1) shells.
...
root@mail:~#

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postconf -e "mydestination = mail.merrillpjensen.com, localhost.locald
+omain, localhost"

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cd /home/sammy/Maildir/
mkdir new cur temp

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root@mail:/home/sammy/Maildir# telnet localhost 25
...
-- 1 Kbytes in 3 Requests.
root@mail:/home/sammy/Maildir#

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```
   THE FQDN
...
       /etc/hosts.
```