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I am installing postfix and I am confused what to put for the system mail name. It has an exmaple that sais use "" if a mail address on the system is "" but it also sais that the mail name should be the FQDN.

my hostname is "mercury" and my FQDN is "", so should I use "" or "" for the system mail name?


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What's the specific parameter you're trying to set in – cjc Mar 25 '12 at 11:29
I am in the process of installing postfix. This is the mail name setting in the package configuration window during installation – Errol Fitzgerald Mar 25 '12 at 11:51
up vote 3 down vote accepted

It would depend how your mail is set up. Generally sounds better, as in most cases, organizations use this format regardless of the actual server sending the mail. However, using the longer one will work as well.

You can always change that later in /etc/mailname.

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