[Mailman-Users] Anonymous emails with the sender information

[Mark Sapiro]

----- Original Message ---------------

Subject: Re: [Mailman-Users] Anonymous emails with the sender
information
   From: Geoff Shang <geoff at QuiteLikely.com>
   Date: Sun, 12 Jun 2011 21:35:49 +0300 (IDT)
     To: mailman-users at python.org

>On Sun, 12 Jun 2011, Mark Sapiro wrote:
>
>> On 6/12/2011 3:03 AM, Nigel Woodley wrote:
>>>
>>> The spam problem I have is because we have many members from different
>>> organisations linked by a private network.
>>>
>>> Emails sent from these organisations are sent out to other members however
>>> when they are received by other organisations on the private network they
>>> are rejected because they have not been delivered internally on the private
>>> network.
>>
>>
>> I don't understand. Either the Mailman server is on the private network
>> or not. If other servers on the network are looking at where mail
>> originates in order to determine whether or not to accept the mail, I
>> would expect them to be looking at the IP address of the sending server
>> or possibly things like the domain of the envelope sender or Received:
>> headers in the message. The last thing I would expect them to look at is
>> the From: header of the message. And, even if they are looking at From:,
>> you seem to say that the original sender whose address is in From: is
>> also on the private network.
>
>The way I understood it was that the systems that are interconnected via 
>the private network expect all traffic that comes from Email addresses 
>hosted on the private network to come *via* the private network and not 
>from outside.  This interpretation is based on the assumption that Mailman 
>is *not* on the private network.
>
>Sounds like they should just whitelist the Mailman server's IP address 
>IMHO.
>
>Geoff.
>
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-- 
Mark Sapiro <mark at msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan