Anthony Peacock wrote:
>
> Hi,
>
> aurora wrote:
>>
>>
>> Duncan Hill wrote:
>>> On Wednesday 23 August 2006 10:19, aurora wrote:
>>>> Basically, we now get alot of customers calling us saying that they
>>>> have
>>>> not received our email and it's because it has been held on their spam
>>>> server with a score of 6, even though its a plain text email! We have
>>>> only
>>>> been getting these issues since we have switched the configuration
>>>> over.
>>>>
>>>> If SpamAssasin doesn't increase the score due to this extra hop/relay,
>>>> I
>>>> can discard this as being a cause of the problem.
>>> Relaying itself is a fundemental part of how e-mail works, and when I
>>> last
>>> looked, SA doesn't hit you for doing that.
>>>
>>> As the customers who are spam-quarantining for the rules that hit - you
>>> may
>>> find that a relay server is listed in a blacklist or similar.
>>>
>>>
>>
>> Hi Duncan, thanks for the quick response.
>>
>> As I understand that relaying is a fundamental part of delivering an
>> email,
>> I'm guessing this configuration is not normal. Our SMTP server hits the
>> ISP's SMTP server which then hits the customers SMTP/POP server. In most
>> cases, your SMTP server will just find a direct route to the destination
>> server and only the sending server and receiving server will be involved
>> without a server being "in the middle", no?
>>
>> Is it not classed as a form of open relaying, even though there is a form
>> of
>> authentication (IP check) on it? Both our external IP and the ISP's email
>> IP
>> are not listed on any blacklist (checked with dnsstuff.com).
>>
>> Again, thanks for the quick reply, it's appreciated.
>
> Your setup does not sound any different to many others.
>
> We are shooting in the dark here, you need to ask your customers to
> provide you with the reasons that they blocked your messages. As they
> are the ones that are blocking they are the only ones who can tell you
> what the reasons are.
>
> If they are using SpamAssassin and they can provide you with the list of
> rules that hit your emails, then this list might be able to give you
> advice on how to stop this happening in the future. Without that we are
> just guessing.
>
> --
> Anthony Peacock
> CHIME, Royal Free & University College Medical School
> WWW: http://www.chime.ucl.ac.uk/~rmhiajp/
> "If you have an apple and I have an apple and we exchange apples
> then you and I will still each have one apple. But if you have an
> idea and I have an idea and we exchange these ideas, then each of us
> will have two ideas." -- George Bernard Shaw
>
>
Thanks for your help Duncan and Anthony, I shall discount this reason for
being the cause of the problem. I will try and get the scores from one of
our customers.
Have a good day!
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