LuKreme wrote:
> Besides that, a lot of spammers sent mail out with forged from addresses
> so that if the spam isin't delivered to the To: i t might be delivered
> by some retarded mailserver to the forged From.
I don't think any spammer worth his spammy salt uses a legitimate
address - it's all forged.
I've got a backup MX that is used by our customers and due to issues with their various authentication mechanisms (some use ldap, some use SQL, some are local...
Bryan Irvine
sparctacus@...
Dec 18, 2007 5:12 pm
... Perhaps you could manage only to accept mails for valid recipients. This would include to extract/generate a list of the recipients from Active Directory...
Matthias Haegele
mhaegele@...
Dec 18, 2007 5:20 pm
... If you need support regarding AD/LDAP-queries, just post. Got some good .cfs ready. BR, Ronny...
Ronny T. Lampert
telecaadmin@...
Dec 18, 2007 5:35 pm
... if you can do recipient validation, then do recipient verification (reject_unverified_sender, only apply to your relay domains...). ... adequate filtering...
mouss
mlist.only@...
Dec 18, 2007 5:27 pm
... Unfortunately, I can't. To many types of setups and too many companies/constantly changing user lists. ... I personally thing it's adequate, I've only...
Bryan Irvine
sparctacus@...
Dec 18, 2007 5:41 pm
... recipient VERIFICATION doesn't require accessing users lists. don't confuse with VALIDATION. with recipient verification, postfix will "simulate" a...
mouss
mlist.only@...
Dec 18, 2007 6:09 pm
<snip> ... <snip> How long is the cache good for? The purpose of the secondary is that if the primary is down mail will still be queued up. Naturally if ...
Bryan Irvine
sparctacus@...
Dec 18, 2007 6:29 pm
... Mouss was referring to the backend server (i.e. the server that actually hosts the email), not the primary MX. If the primary MX is the same box as the...
Brian Collins
listbc@...
Dec 18, 2007 6:58 pm
... if the response (positive or negative) is in the cache, postfix won't ask the remote host. here is something you can do: - parse your logs to find...
mouss
mlist.only@...
Dec 18, 2007 9:59 pm
On Tue, 18 Dec 2007 09:12:19 -0800 ... As many have responded to this list in the past: http://www.postfix.org/BACKSCATTER_README.html ... _|_ (_| |...
Duane Hill
d.hill@...
Dec 18, 2007 6:33 pm
... I'm always quick with the FAQ links too. ;) I did read that but it didn't really seem to apply to this particular situation. I think mouss hit it right on...
Bryan Irvine
sparctacus@...
Dec 18, 2007 6:38 pm
Hello, In order to elliminate backscatter, I would like postfix to send non delivery reports only to my domains ( not to external domains like yahoo or google...
Guillaume Nadot
gnadot@...
Apr 28, 2008 9:38 am
... Thank you for your interest in stopping abuse (at least, in stopping YOUR abuse, which is all anyone can ask of you.) ... Do any of these external servers...
/dev/rob0
rob0@...
Apr 28, 2008 10:16 am
... Do not accept mail for non-existent recipients. Wietse...
Wietse Venema
wietse@...
Apr 28, 2008 12:27 pm
the following is the log from my gateway to a subdomain; there are lot <> sender mails are going; is it backscatter?; some are rejected on the basis of...
K bharathan
kbharatan@...
Jul 3, 2009 8:58 am
... It becomes backscatter if the recipient server rejects the mail and you're stuck with it. So the solution is simple: don't relay mail for someone who...
kj
koffiejunkielistlurke...
Jul 3, 2009 9:24 am
... What I suggest you do is set up some kind of forwarding for Postscatter so it is sent to: wietse@.... I wish everyone who suffers Postscatter...
R Johnson
zen158416@...
Jul 3, 2009 9:36 am
This poster is terminated. I authorize the other postfix list admins to terminate inflammatory or otherwise inappropriate behavior on this list. Wietse...
Wietse Venema
wietse@...
Jul 3, 2009 11:36 am
... OK, I realize there is obvious hate for Wietse in this post, so lets ignore that for now... Other than hanging around and possibly multiplying in mail...
Andrew Thompson
andrewkt@...
Jul 4, 2009 2:35 am
On Fri, 03 Jul 2009 22:35:11 -0400 ... More to the point, is there *any* valid reason to blame Postfix for any particular flavor of backscatter? I see nothing...
Chris Babcock
cbabcock@...
Jul 4, 2009 2:49 am
... The person who posted the incomprehensible remark about postscatter is no longer on the list. Other than expressing his dissatisfaction in an...
Noel Jones
njones@...
Jul 4, 2009 3:40 am
i've been running this relay gateway for 2 yrs now; i'd no problems of backscatters; have got a relay_recipient table and it take care of this; also kept a...
K bharathan
kbharatan@...
Jul 4, 2009 5:39 am
... Please don't top-post. For customer domains, either require a valid recipient list, or use reject_unverified_recipient to let postfix build a recipient...
Noel Jones
njones@...
Jul 4, 2009 2:01 pm
... Wait until you get hundreds of thousands of backscatter where someone has sent out spams with your user name as the From: address and helpful mail systems...
LuKreme
kremels@...
Jul 5, 2009 2:47 am
On Sat, 4 Jul 2009 20:46:16 -0600 ... http://www.backscatterer.org/?target=usage well worth looking at ... -- John...
John Peach
postfix@...
Jul 5, 2009 2:53 am
... Yeah, I added that a few months ago. -- How you have felt, o men of Athens, at hearing the speeches of m accusers, I cannot tell; but I know that their...
LuKreme
kremels@...
Jul 5, 2009 2:57 am
... I don't think any spammer worth his spammy salt uses a legitimate address - it's all forged. --kj...
kj
koffiejunkielistlurke...
Jul 5, 2009 1:08 pm
... Another one for the kill-file.......
lst_hoe02@...
Jul 4, 2009 2:20 pm
Sorry, I misread your log. from=<> usually means a bounce of some kind - could be legitimate. You'll have to see where the original mail was sent to, the...
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