try to change your hosts file to look like this:
homeland:~# cat /etc/hosts
127.0.0.1 localhost.localdomain localhost
88.198.37.43 control.zarrelli.org control homeland.zarrelli.org homeland
after the change the otput of hostname command should look like this:
homeland:/etc/postfix# hostname
homeland.zarrelli.org
homeland:/etc/postfix# hostname -f
homeland.zarrelli.org
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