From: Adam Jacob Muller (no email)
Date: Sat Jun 02 2007 - 23:27:49 EDT
On Jun 2, 2007, at 10:54 PM, Diego M. Vadell wrote:
> On Sunday 03 June 2007 02:25:01 Adam Jacob Muller wrote:
>> On Jun 2, 2007, at 9:25 PM, Diego M. Vadell wrote:
>>> Hi all,
>>> I'm having trouble sending mail to Bellsouth.net . The only
>>> reason I can
>>> think of is because bellsouth.net's MXs think Im sending the spam,
>>> as they
>>> accept my mail, but then it does not appear in the rcpt's mailbox.
>>> So I sent myself a mail and it was tagged, by my mail server, as
>>> spam,
>>> because I (the client) am in a dyn address, dial-up network. I
>>> know I can
>>> configure my own spamassassin, but Im more concerned to how
>>> bellsouth.net /
>>> the rest of the world sees my mails.
>>> So I want to ask postfix to take the "Recieved" lines, but only
>>> if the
>>> client authenticated. And Im lost in this one. I could ask that with
>>> header_checks:
>>>
>>> /^Received: / IGNORE
>>>
>>> but how do I make header_checks to only apply to authenticated
>>> clients? Is
>>> there another way I can make my mails not to appear as spam because
>>> I have a
>>> dyn IP address at home?
>>>
>>> Thanks in advance
>>>
>>> -- Diego.
>>
>> Is your postfix server itself the one that is on a dynamic IP? If so,
>> stripping the prior received headers won't do anything as their MTA
>> will still know your sending mail from a dynamic IP (that received
>> header gets added by THEIR MTA).
>> If your talking about prior received headers, then they (and you)
>> shouldn't be scoring based on anything but the most recent received:
>> header, anything before that should not be a part of a spam check for
>> various reasons, this being one of them, forgery being another.
>> Also, if your stripping out received headers, and you start emitting
>> spam, how are you going to know where it's coming from?
>>
>> -Adam
>
> Hi Adam,
> Thanks for the answer. My server does not have a dynamic IP, but
> my PC at
> home does. And bellsouth _does_ filter based on all the Received
> headers: I
> added something like this to header_checks:
>
> /^Received: .*Authenticated sender: / IGNORE
>
> and enabled smtpd_sasl_authenticated_header so I can filter the
> header only
> when somebody authenticates. And now the mails appear in the
> bellsouth user's
> mailbox.
>
> Well, you do have a point there: if I somehow start emitting
> spam, I wont
> have an easy way to tell who is sending it. But I do have the logs,
> with IP
> addressess and sasl usernames.
>
> What do you think about this setup? I much appreciate comments.
>
> Thanks again,
> -- Diego.
Complain to the bell south postmaster.
At the minimum setup some transports so this only happens to mail for
bellsouth.net.
-Adam
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