[gentoo-user] Why does sendmail think its hosts name is `localhost'

[gentoo-user] Why does sendmail think its hosts name is `localhost'

[Harry Putnam]

Can anyone here tell me what might cause a tool like sendmail to get
the idea its hosts name is `localhost'.  I don't mean the generic way
localhost is often used but as an actual host name:

My home network is local.net0  the host sendmail runs on is reader

Sendmail puts the righthand side of local mail as
   reader@localhost.local.net0  

and sendmail logs show `localhost' where
the host name normally is.
  Feb  6 22:00:11 localhost sm-mta[10219]:[...]

hostname and domainname return the right stuff:
  hostname 
   reader
and
  domainname
   local.net0

But here we start to see a problem:

  hostname -f 
   localhost
or
  hostname --long
   localhost
=== * ===    === * ===    === * === 
 
I'm really stumped on this...
I've set up the normal files for this like this:

# /etc/conf.d/hostname
  ------- 8< snip -------- 
  # Set to the hostname of this machine
  HOSTNAME="reader"
  ------- 8< snip -------- 

# /etc/conf.d/domainname
  ------- 8< snip -------- 
  # OVERRIDE=1
  DNSDOMAIN="local.net0"
  NISDOMAIN="local.net0"
  ------- 8< snip -------- 

/etc/hosts:
  ------- 8< snip -------- 
  127.0.0.1	localhost       reader
  ## ============================================
  192.168.0.4     reader.local.net0    reader     # gentoo
  #===========================================================
  192.168.0.3     mob2.local.net0      mob2  # winxp (home)
  [...]
  ------- 8< snip -------- 

/etc/resolv.conf:
  ------- 8< snip -------- 
  domain local.net0 
  search local.net0
  nameserver 0.0.0.0 # I run my own nameserver
  nameserver 192.168.0.20
  ------- 8< snip -------- 

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Re: [gentoo-user] Why does sendmail think its hosts name is `localhost'

[Heinz Sporn]

Am Montag, den 06.02.2006, 22:11 -0600 schrieb Harry Putnam:
> Can anyone here tell me what might cause a tool like sendmail to get
> the idea its hosts name is `localhost'.  I don't mean the generic way
> localhost is often used but as an actual host name:
> 
> My home network is local.net0  the host sendmail runs on is reader
> 
> Sendmail puts the righthand side of local mail as
>    reader@localhost.local.net0  
> 
> and sendmail logs show `localhost' where
> the host name normally is.
>   Feb  6 22:00:11 localhost sm-mta[10219]:[...]
> 
> hostname and domainname return the right stuff:
>   hostname 
>    reader
> and
>   domainname
>    local.net0
> 
> But here we start to see a problem:
> 
>   hostname -f 
>    localhost
> or
>   hostname --long
>    localhost
> === * ===    === * ===    === * === 
>  
> I'm really stumped on this...
> I've set up the normal files for this like this:
> 
> # /etc/conf.d/hostname
>   ------- 8< snip -------- 
>   # Set to the hostname of this machine
>   HOSTNAME="reader"
>   ------- 8< snip -------- 
> 
> # /etc/conf.d/domainname
>   ------- 8< snip -------- 
>   # OVERRIDE=1
>   DNSDOMAIN="local.net0"
>   NISDOMAIN="local.net0"
>   ------- 8< snip -------- 
> 
> /etc/hosts:
>   ------- 8< snip -------- 
>   127.0.0.1	localhost       reader

Switch that to: 127.0.0.1 reader localhost
and you'll be fine.

>   ## ============================================
>   192.168.0.4     reader.local.net0    reader     # gentoo
>   #===========================================================
>   192.168.0.3     mob2.local.net0      mob2  # winxp (home)
>   [...]
>   ------- 8< snip -------- 
> 
> /etc/resolv.conf:
>   ------- 8< snip -------- 
>   domain local.net0 
>   search local.net0
>   nameserver 0.0.0.0 # I run my own nameserver
>   nameserver 192.168.0.20
>   ------- 8< snip -------- 
> 

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[gentoo-user] Re: Why does sendmail think its hosts name is `localhost'

[Harry Putnam]

Heinz Sporn <heinz.sporn@sporn-it.com> writes:

>> /etc/hosts:
>>   ------- 8< snip -------- 
>>   127.0.0.1	localhost       reader
>
> Switch that to: 127.0.0.1 reader localhost
> and you'll be fine.

Hoohaa   yes yes.  That did it.  I can say with assurance though since
I keep nearly all config files under cvs control: That has been just
like posted thru several installs, rebuilds etc and did not cause this
problem before.   

I thought that statement was true but I did look at some older
versions from cvs and see that yes, it was just like I posted here.
But sendmail showed the right name in rhside of local messages.

Soooo, I'm wondering if there have been small changes in sendmail
since my last big install that might cause this.. but not interested
enough to track down the exact changes and probably wouldn't
understand what they did anyway.

I'm just happy to have a host name again.  It wasn't actually causing
a problem... mail sending and receiving with sendmail worked.  It just
keep making me think I would have some kind of problem eventually.

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