[Mailman-Users] Anonymous emails with the sender information

[Nigel Woodley]

Hi Geoff and Mark

Your understanding is correct and unfortunately the mailman server has to be
external.

Also unfortunately it is not possible to whitelist the mailman server on the
email servers within the private networks.

Any other ideas ?

Many thanks in advance

 
Nigel
-----Original Message-----
From: mailman-users-bounces+nigel.woodley=lufty.co.uk at python.org
[mailto:mailman-users-bounces+nigel.woodley=lufty.co.uk at python.org] On
Behalf Of Geoff Shang
Sent: 12 June 2011 19:36
To: mailman-users at python.org
Subject: Re: [Mailman-Users] Anonymous emails with the sender information

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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