Need email server aid

[Chan Chung Hang Christopher]

Chuck Kuecker wrote:
> Chan Chung Hang Christopher wrote:
>> Chuck Kuecker wrote:
>>   
>>> Markus Schönhaber wrote:
>>>     
>>>> 22.04.2010 01:18, Chuck Kuecker:
>>>>
>>>>       
> <snip>
>>>>> mail.ckent.org[66.254.194.29]
>>>>>     
>>>>>         
>>>> Above, you said that the embedded system is in your local network. But
>>>> this log excerpt shows a client connecting from 66.254.194.29, i. e. an
>>>> IP that is neither in 127.0.0.0/8 nor 192.168.0.0/16. Therefore it's not
>>>> contained in the IP ranges you configured as mynetworks and
>>>> permit_mynetworks doesn't apply.
>>>>
>>>>   
>>>>       
>>> OK. I see that. 66.254.194.29 is my static IP from my ISP. When I 
>>> resolve 'mail.ckent.org', that's what comes up. I certainly don't want 
>>> just anyone sending email to that IP to be able to relay!
>>>
>>> This is what confuses me - my Windoze PC has Thunderbird set up to 
>>> access email via 'mail.ckent.org', and it's on my local network, just 
>>> like the embedded gadget and the Linux box hosting 'mail.ckent.org'. Why 
>>> does the PC connect reliably, but the embedded gadget fails reliably?
>>>
>>>     
>> Where did you point your embedded system to send email? 192.168.x.x or 
>> something else?
>>
>>   
> Emails were sent to 'mail.ckent.org' which resolves to 66.254.194.29. 
> Ultimately, I need to send email to an arbitrary mail server the user 
> has an account on.
> 
> If I sent to 192.168.0.200, which is the Ubuntu machine, would that help?
> 

Immensely I suspect.