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When I install sendmail from the debian repos, I get the following output:

Disabling HOST statistics file(/var/lib/sendmail/host_status).
Creating /etc/mail/sendmail.cf...
Creating /etc/mail/submit.cf...
Informational: confCR_FILE file empty: /etc/mail/relay-domains
Informational: confCT_FILE file empty: /etc/mail/trusted-users
Updating /etc/mail/access...
Updating /etc/mail/aliases...
WARNING: local host name (ixtmixilix) is not qualified; see cf/README: WHO AM I?

Can someone please tell me what this means, what I need to do to qualify my hostname?

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I couldn't add/create appropriate tags because my rank is still rather low... –  ixtmixilix Sep 3 '10 at 19:58

2 Answers 2

up vote 3 down vote accepted

It's referring to this page from the readme, which tells you how to specify your hostname. It's warning you that your hostname won't work outside your local network; sendmail attaches your hostname as the sender of the message, but it's going to be useless on the other end because people outside your local network can't find the machine ixtmixilix. You should specify a hostname that can be resolved from anywhere, like ixtmixilix.example.com

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Where should I put the line suggested in the docs? (Dmbar.com define(confDOMAIN_NAME', $w.$m')dnl) Is it in /etc/mail/sendmail.mc? –  Throoze Apr 21 '14 at 21:47
in /etc/mail/sendmail.cf , then .mc will be updated automatically after running : sendmailconfig cmd –  Abdennour TOUMI Jul 17 '14 at 13:22
@AbdennourTOUMI You sure that’s not the other way around? Edit sendmail.mc, and .cf will be updated? –  Jezen Thomas Mar 17 at 23:58

This output refers to a Fully-qualified domain name (FQDN). Which is either an IP address or a domain name (something with a dot in it).

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