Hi,
is it possible to turn on a spam filter for the grass-web mailing list?
The recent archives seem to contain more noise than signal.
thanks,
Hamish
Hamish wrote:
Hi,
is it possible to turn on a spam filter for the grass-web mailing list?
The recent archives seem to contain more noise than signal.
Hamish,
I don't know how these spams are getting to the list. They appear to be
from spammers who are not subscribed so they should be held for approval.
Perhaps someone mistakenly approved a big batch?
I would suggest that lists be set to automatically reject email from
unsubscribed senders so these things don't even end up in the "held for
approval" queue.
Incidentally, today (at Markus' request) ShawnB has implemented greylisting
on all email through "osgeo1" including all lists.osgeo.org address. So
much of the spam may be stopped by that, as well as some amount of email
from legitimately subscribed folks whose email system is poorly configured.
Best regards,
--
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up | Frank Warmerdam, warmerdam@pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush | President OSGeo, http://osgeo.org
Hamish wrote:
> is it possible to turn on a spam filter for the grass-web mailing
> list? The recent archives seem to contain more noise than signal.
Frank wrote:
I don't know how these spams are getting to the list. They appear to
be from spammers who are not subscribed so they should be held for
approval.
I just tested sending a message and got:
"Your mail to 'grass-web' with the subject
test message from unsubscribed address
Is being held until the list moderator can review it for approval.
The reason it is being held:
Post by non-member to a members-only list
Either the message will get posted to the list, or you will receive
notification of the moderator's decision. If you would like to cancel
this posting, please visit the following URL: ..."
strange.
Perhaps someone mistakenly approved a big batch?
I don't think so, they keep coming, even new ones in the last 2 days.
I would suggest that lists be set to automatically reject email from
unsubscribed senders so these things don't even end up in the "held for
approval" queue.
AFAIK Markus is the one shouldering the approval work here, so I would
leave the decision up to him.
?
Incidentally, today (at Markus' request) ShawnB has implemented
greylisting on all email through "osgeo1" including all
lists.osgeo.org address. So much of the spam may be stopped by that,
as well as some amount of email from legitimately subscribed folks
whose email system is poorly configured.
What does "poorly configured" email system mean?
(e.g. I often spoof my own from address so I can post using a local SMTP
server not yahoo's [university firewall issues, local client,
fetchyahoo.pl cron job -> local mbox, ...])
Hamish
____________________________________________________________________________________
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Hamish wrote:
What does "poorly configured" email system mean?
(e.g. I often spoof my own from address so I can post using a local SMTP
server not yahoo's [university firewall issues, local client,
fetchyahoo.pl cron job -> local mbox, ...])
Hamish,
I gather greylisting works by holding refusing an email the first time,
and waiting to see if the sender retries. Once they have done this once
they are assumed to be "real" and email is send through directly in the future.
This is built on the assumption that spammers don't implement smtp retries
properly, but that all real mail systems do implement it properly.
So I'm referring to smtp systems that do not properly retry sending an email
later if it fails the first time.
But, I don't know all the details about this stuff, and I don't particularly
want to be in the middle of it, which is why I failed to act on Markus'
suggestion for several months.
Best regards,
--
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up | Frank Warmerdam, warmerdam@pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush | President OSGeo, http://osgeo.org
Frank, Hamish,
die to the spam bombing I had recently set the grass-web list to
moderation ("hold"). That's why.
The chain was:
User -> weblist at grass itc.it -> /etc/aliases ->
-> neteler.osgeo..gmail.com (for Spam filtering) -> FWD ->
-> grass-web at lists osgeo.org ("hold")
Since yesterday greylisting is active [1] and spam disappeared (as expected).
Right now I have opened the grass-web again so that mails should
go through directly.
The chain is now:
User -> weblist at grass itc.it -> /etc/aliases ->
-> neteler.osgeo..gmail.com (for Spam filtering) -> FWD ->
-> postgrey -> grass-web at lists osgeo.org
To make sense of postgrey here, we should change "weblist at grass itc.it"
to an alias at OSGeo.org which goes directly to "grass-web at lists osgeo.org".
We can fix that the next days.
cheers
Markus (still 700 unread emails)
[1] http://trac.osgeo.org/osgeo/ticket/190
On Wed, Mar 19, 2008 at 2:59 AM, Frank Warmerdam <warmerdam@pobox.com> wrote:
Hamish wrote:
> What does "poorly configured" email system mean?
> (e.g. I often spoof my own from address so I can post using a local SMTP
> server not yahoo's [university firewall issues, local client,
> fetchyahoo.pl cron job -> local mbox, ...])Hamish,
I gather greylisting works by holding refusing an email the first time,
and waiting to see if the sender retries. Once they have done this once
they are assumed to be "real" and email is send through directly in the future.
This is built on the assumption that spammers don't implement smtp retries
properly, but that all real mail systems do implement it properly.So I'm referring to smtp systems that do not properly retry sending an email
later if it fails the first time.But, I don't know all the details about this stuff, and I don't particularly
want to be in the middle of it, which is why I failed to act on Markus'
suggestion for several months.Best regards,
--
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up | Frank Warmerdam, warmerdam@pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush | President OSGeo, http://osgeo.org_______________________________________________
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