Need email server aid

[Chuck Kuecker]

Christopher Chan wrote:
>>> Apr 21 17:01:40 ckenterprises postfix/smtpd[24088]: NOQUEUE: reject:
>>> RCPT from mail.ckent.org[66.254.194.29]: 554 5.7.1
>>> <addr at dest.com>: Relay access denied; from=<device at ckent.org>
>>> to=<addr at dest.com>  proto=SMTP helo=<ckent.org>
>>> Apr 21 17:01:40 ckenterprises postfix/smtpd[24088]: disconnect from
>>>
>>>       
>> If I remember correctly, reject_unknown_sender_domain requires a
>> working DNS, A record, and maybe MX for the connecting IP. You might
>> try re-ordering that section, or just remove that as a test (be sure
>> to do a postfix reload).
>>
>>     
>
> That's not a unknown sender domain problem, that's postfix doing the 
> right thing. I suspect the OP forgot to enable authentication on his 
> mail client.
>
>   
'Email client' being the simple code that sends the SMTP command packet 
that is my email in my embedded system? There's nothing but opening a 
socket and sending packets - no actual 'client' code at all.

One thing I have been researching is a very small email client that I 
can embed. So far, I have not found the solution. My embedded system is 
fairly good on memory, but there are limits you don't have with a PC 
running Ubuntu.

If there's a quick and dirty way of providing authentication from the 
embedded box that you know of, please let me know. In the future it 
would be nice to be able to receive email as well as send it. The 
original code I started from had email receive capability, but nothing 
for security. I can handle SSL and such if I have to.

Chuck Kuecker