Matt Garretson a écrit :
> Ned Slider wrote:
>> how much faith
>> do you place in a mail admin deploying SPF _AND_ bouncing messages on
>> SPF failure when they can't even address the issue that their servers
>> are responsible for the backscatter problem
>
>
> I think that you may be assumin
John Hardin a écrit :
> On Thu, 12 Feb 2009, Ned Slider wrote:
>
>> John Hardin wrote:
>>
>>> Huh? My mail server relays messages from my home network to the entire
>>> world. I'm not talking about custom relays.
>>
>> I think I'm going to have to concede this point to you though on
>> relays, a
John Hardin a écrit :
> On Wed, 11 Feb 2009, Ned Slider wrote:
>
>> John Hardin wrote:
>>
>>> > You won't solve the backscatter problem with SPF.
>>>
>>> Nobody has claimed that. It helps, but it's not a silver bullet.
>>
I have seen no evidence of that (that = "it helps"). and yes, I asked:
thi
Ned Slider wrote:
> how much faith
> do you place in a mail admin deploying SPF _AND_ bouncing messages on
> SPF failure when they can't even address the issue that their servers
> are responsible for the backscatter problem
I think that you may be assuming too much about the way other people
On Thu, 12 Feb 2009, Ned Slider wrote:
John Hardin wrote:
Huh? My mail server relays messages from my home network to the entire
world. I'm not talking about custom relays.
I think I'm going to have to concede this point to you though on relays,
although one could argue that you don't rea
John Hardin wrote:
On Thu, 12 Feb 2009, Ned Slider wrote:
John Hardin wrote:
On Wed, 11 Feb 2009, Ned Slider wrote:
> If every server used Postfix in it's default configuration then >
backscatter wouldn't exist.
Question: if a relay MTA accepts a forged-sender message for another
doma
On Thu, 12 Feb 2009, Ned Slider wrote:
John Hardin wrote:
On Wed, 11 Feb 2009, Ned Slider wrote:
> If every server used Postfix in it's default configuration then
> backscatter wouldn't exist.
Question: if a relay MTA accepts a forged-sender message for another
domain, attempts to deli
John Hardin wrote:
On Wed, 11 Feb 2009, Ned Slider wrote:
If every server used Postfix in it's default configuration then
backscatter wouldn't exist.
Question: if a relay MTA accepts a forged-sender message for another
domain, attempts to deliver it, gets an SMTP 5xx hardfail for unknown
re
On Wed, 11 Feb 2009, Ned Slider wrote:
If every server used Postfix in it's default configuration then
backscatter wouldn't exist.
Question: if a relay MTA accepts a forged-sender message for another
domain, attempts to deliver it, gets an SMTP 5xx hardfail for unknown
recipient, and attempt
Martin Gregorie wrote:
On Wed, 2009-02-11 at 19:29 +, Ned Slider wrote:
SPF will only help if other people's mail servers deploy and bounce
mail on failed SPF, but as I asserted in an earlier post to this
thread, how much faith do you place in a mail admin deploying SPF
_AND_ bouncing messa
On Wed, 11 Feb 2009, Ned Slider wrote:
John Hardin wrote:
> You won't solve the backscatter problem with SPF.
Nobody has claimed that. It helps, but it's not a silver bullet.
I don't see how you can possibly quantify that. You have no idea how
much spam was sent forging your domain so how
On Wed, 2009-02-11 at 19:29 +, Ned Slider wrote:
> Martin Gregorie wrote:
>
> > This backscatter is precisely what SPF records are meant to alleviate.
> > You should have a valid SPF message set up for every registered domain
> > handled by your mail servers.
> >
>
> How so?
>
> The backscat
John Hardin wrote:
On Wed, 11 Feb 2009, Ned Slider wrote:
The backscatter he is receiving is most likely DSN messages sent from
mail servers in response to his (forged) sender address. SPF will only
help if other people's mail servers deploy and bounce mail on failed
SPF, but as I asserted in
On Wed, 11 Feb 2009, Ned Slider wrote:
The backscatter he is receiving is most likely DSN messages sent from mail
servers in response to his (forged) sender address. SPF will only help if
other people's mail servers deploy and bounce mail on failed SPF, but as I
asserted in an earlier post to
Martin Gregorie wrote:
On Wed, 2009-02-11 at 11:10 -0600, Karl Boyken wrote:
Hello,
I've got SA with a few features installed and it's working great and
has been for a while.
However, over the past few weeks I've had a few select users complain
about receiving 3-4 thousand bounce messages
On Wed, 2009-02-11 at 11:10 -0600, Karl Boyken wrote:
> > Hello,
> >
> > I've got SA with a few features installed and it's working great and
> > has been for a while.
> >
> > However, over the past few weeks I've had a few select users complain
> > about receiving 3-4 thousand bounce message
Hello,
I've got SA with a few features installed and it's working great and
has been for a while.
However, over the past few weeks I've had a few select users complain
about receiving 3-4 thousand bounce messages per day from what appears
to be mail delivery error messages. From what I can
John Hardin wrote:
On Tue, 10 Feb 2009, Johnson, S wrote:
However, over the past few weeks I've had a few select users complain
about receiving 3-4 thousand bounce messages per day from what appears
to be mail delivery error messages. From what I can tell it's the
spammer spoofing the sender
On Tue, 10 Feb 2009, Johnson, S wrote:
This isn't coming from within our network... Someone on the outside is
using these email addresses to send their spam. We just get the
responses when they try to send to a person that doesn't exist.
That's what I understood you to be saying.
-Origi
, February 10, 2009 11:44 AM
To: Johnson, S
Cc: users@spamassassin.apache.org
Subject: Re: system response message backlash from spam messages
On Tue, 10 Feb 2009, Johnson, S wrote:
> However, over the past few weeks I've had a few select users complain
> about receiving 3-4 thousan
On Tue, 10 Feb 2009, Johnson, S wrote:
However, over the past few weeks I've had a few select users complain
about receiving 3-4 thousand bounce messages per day from what appears
to be mail delivery error messages. From what I can tell it's the
spammer spoofing the sender with their user ID a
On Tue, 2009-02-10 at 11:14 -0600, Johnson, S wrote:
> However, over the past few weeks I've had a few select users complain
> about receiving 3-4 thousand bounce messages per day from what appears
> to be mail delivery error messages. From what I can tell it's the
> spammer spoofing the sender
> Hello,
>
> I've got SA with a few features installed and it's working great and
> has been for a while.
>
Enable the vbounce detector.
See 20_vbounce.cf
--
Michael Scheidell, CTO
>|SECNAP Network Security
Finalist 2009 Network Products Guide Hot Companies
FreeBSD SpamAssassin Ports mainta
Hello,
I've got SA with a few features installed and it's working great and
has been for a while.
However, over the past few weeks I've had a few select users complain
about receiving 3-4 thousand bounce messages per day from what appears
to be mail delivery error messages. From what I can t
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