How to get mail to local destinations delivered?

Peter J. Stieber developer at toyon.com
Mon Nov 12 15:08:22 UTC 2007


Chris G wrote:
> On Mon, Nov 12, 2007 at 08:56:14PM +0900, John Summerfield wrote:
>> Chris G wrote:
>>> On Sat, Nov 10, 2007 at 11:28:16PM +0530, Vivek J. Patankar wrote:
>>>> Chris G wrote:
>>>>> I don't want to open up port 25 and it seems a bit silly anyway to
>>>>> send mail on such a long round trip.  Is there any way I can tell
>>>>> sendmail that home.isbd.net is localhost (or 192.168.1.1)?  I have an
>>>>> entry for home.isbd.net in my /etc/hosts file which is:-
>>>>>     192.168.1.1     home    home.isbd.net
>>>> Try adding 127.0.0.1 as home.isbd.net in the hosts file.
>>>>
>>> There's a big comment in /etc/hosts saying that breaks things.
>>
>> He said "add," not "change" or "replace." It shouldn't take long to see 
>> what it breaks, if anything.
>>
> The comment says:-
> 
>     # By the way, Arnt Gulbrandsen <agulbra at nvg.unit.no> says that 127.0.0.1
>     # should NEVER be named with the name of the machine.  It causes problems
>     # for some (stupid) programs, irc and reputedly talk. :^)
>     #
> 

Chris,

Have a look at

http://www.linuxhomenetworking.com/wiki/index.php/Quick_HOWTO_:_Ch21_:_Configuring_Linux_Mail_Servers

Note the 127.0.0.1 line they use.  It is about one quarter of the way 
down the page.

Doing this and removing your 192.168.1.1 line in hosts is a way to "tell 
sendmail that home.isbd.net is localhost".

Depending on your configuration, you may be able to get away with only 
removing the 192.168.1.1 line in /etc/hosts.  The Machine will know its 
name is associated with 192.168.1.1 from 
/etc/sysconfig/networking/devices/ifcfg-eth*.

Pete




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