[BlueOnyx:14258] Re: Stopping User at localhost.localdomain Spam
blueonyx at sb9.com
Mon Jan 13 00:16:54 PET 2014
That is not a actual User on the system except as admin file owner
right? and it appears to be coming from outside the server...
I have no accounts with 'User' as the user name.
I don't believe I have a open relay. They use different IP's so blocking
is not really a option sine they use it once then use another..
Using localhost.localdomain as a forged header i assume to fool
Below is header from me to a test account on the same server.
Received: from [192.168.0.11] (cpe-666-688-111-203.austin.res.com
(authenticated bits=0) by fs.mailserver.com (8.13.8/8.13.8) with ESMTP
id s0D56s3B013948 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA
bits=256 verify=NO) for <x at xxx.com>; Sun, 12 Jan 2014 23:06:56 -0600
Message-ID: <52D37472.5000709 at xxx.com>
i've never seen localhost.localdomain using local mail...
Thanks to all.. i'll look further..
On 1/12/2014 12:38 PM, Chuck Tetlow wrote:
> It appears that someone has a valid username/password on your server,
> and is using the SMTP-Auth to relay e-mail.
> So, first and easiest thing to do to stop it is firewall out that
> address. At the command line, enter:
> iptables -I acctin 1 -s 220.127.116.11/24 -j DROP
> That will stop the scumbag from relaying any e-mail through you, even
> if he changes his IP to another in his network.
> Then you've got to figure out which account on your server is being
> used. That's a little harder - and takes time sorting through the
> logs to find. Although sometimes you can spot it by going through the
> management GUI and looking at USAGE reports on which domain/user is
> sending the most e-mail/using the network the heaviest.
> Once you've figured out which account is being used, simply change the
> password. That should stop it. Worse case, delete that account. I
> had one just like it two weeks ago, and even suspending the account
> didn't prevent him from relaying through the server. So I just
> deleted the account which put a end to it.
> *---------- Original Message -----------*
> From: David Hahn <blueonyx at sb9.com>
> To: BlueOnyx General Mailing List <blueonyx at mail.blueonyx.it>
> Sent: Sun, 12 Jan 2014 11:51:22 -0600
> Subject: [BlueOnyx:14253] Stopping User at localhost.localdomain Spam
> > I Hi all hope all is well,
> > I can't seem to stop some spam. I have the from address
> > Blacklisted in the GUI but it always gets through.
> > Here are the headers:
> > Return-Path: <customer.care at icicibank.com>
> > Received: from localhost.localdomain ([18.104.22.168])
> > by fs.xxx.com (8.13.8/8.13.8) with ESMTP id s0CFCENu001942
> > (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO)
> > for <x at xxx.com>; Sun, 12 Jan 2014 09:12:16 -0600
> > Received: from User (localhost.localdomain [127.0.0.1])
> > by localhost.localdomain (8.13.8/8.13.8) with SMTP id
> > Tue, 7 Jan 2014 13:30:30 -0300
> > Message-Id: <201401071630.s07GUSDv031525 at localhost.localdomain>
> > From: "ICICI Bank"<customer.care at icicibank.com>
> > Subject: ICICI ALERT: Important Security Message
> > Logs:
> > Jan 12 09:12:15 fs sendmail: STARTTLS=server,
> relay=[22.214.171.124], version=TLSv1/SSLv3, verify=NO,
> cipher=DHE-RSA-AES256-SHA, bits=256/256
> > Jan 12 09:12:16 fs milter-greylist: s0CFCENu001942: addr
> 126.96.36.199 from <customer.care at icicibank.com> rcpt <xt at xxx.com>:
> autowhitelisted for 72:00:00
> > Jan 12 09:12:19 fs sendmail: s0CFCENu001942:
> from=<customer.care at icicibank.com>, size=1195619, class=0, nrcpts=1,
> msgid=<201401071630.s07GUSDv031525 at localhost.localdomain>,
> proto=ESMTP, daemon=MTA, relay=[188.8.131.52]
> > Jan 12 09:12:19 fs sendmail: s0CFCENu001942: to=<x at xxx.com>,
> delay=00:00:03, xdelay=00:00:00, mailer=local, pri=1226110, dsn=2.0.0,
> > It looks like the 'Received: from User (localhost.localdomain
> [127.0.0.1])' might be the reason it bypasses the spam a/v and
> > Any suggestions would be helpful.
> > --
> > Thank you
> > David Hahn
> > ----
> > Hey Super Users! - su
> > Get E Mail Alerts when sites or services are up or down.
> > Remotely Monitor Website and/or Service Absolutely Free in seconds.
> > http://mon.pagekeeperservice.com <http://mon.pagekeeperservice.com/>
> > _______________________________________________
> > Blueonyx mailing list
> > Blueonyx at mail.blueonyx.it
> > http://mail.blueonyx.it/mailman/listinfo/blueonyx
> *------- End of Original Message -------*
Hey Super Users! - su
Get E Mail Alerts when sites or services are up or down.
Remotely Monitor Website and/or Service Absolutely Free in seconds.
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the Blueonyx