The latest twist with the lousiest isp

Jeremy Utley jeremy at jutley.org
Tue Dec 21 02:28:32 PST 2004


Declan Moriarty wrote:

>On Mon, 20 Dec 2004 19:15:23 +0000, S. Anthony Sequeira
><tony at sequeira.org.uk> wrote:
>  
>
>>On Mon, 2004-12-20 at 10:10 +0000, Declan Moriarty wrote:
>>    
>>
>>>The attached shows a bounced message header and an extract from
>>>mail.log under linux.
>>>The mail server decides to bounce me. My IP has changed here, so I
>>>gather it's not an IP thing. I get mail in, so it's hardly a username
>>>thing either.
>>>
>>>They know from my IP that I'm on a subnet. I feel fairly sure they are
>>>rejecting mail - all mail servers from a subnet. It conceivably could
>>>be operating systems, as they only support 'doze. If I could
>>>patch/configure postfix to identify as m$ outlook under windows, it
>>>would run fine.
>>>      
>>>
>>Speaking as a dabbler, definitely *not* an expert, seems to me you may
>>have a misconfigured main.cf.  Could we have a look at it please.
>>    
>>
>
>Yes, that is correct. Hopefully find it attached.
>
>Before you all start lambasting me, let me explain. Everything was
>working fine, and then suddenly I couldn't send mail and was getting
>this message. No changes to main.cf had been made. Further,
>smtp.ntlworld.ie (62.253.162.40/50) was now being picked up by
>mailhost.ntl.com (212.250.162.x). One obvious difference was that the
>box identifies as "GENIUS" in 'doze, but genius.chateau.dec in linux.
>So changes to drop the domain have been made after the problem
>started.
>  
>
This is probably going to be the problem.  When it identifies as 
genius.chateau.dec during the SMTP transaction, their mail servers are 
probably rejecting that because it's clearly invalid.  Try making that 
into something like genius.ntl.com or something to that effect, and see 
what happens.

-J-



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