on whm/Cpanel I have set max emails per hour limit to 250 for the server, but when a user tries to send thousands of emails, the server still accepts them (they are placed in queue but not delivered) and load spikes.
I am wondering is there is a way for exim to reject those emails when the user attempts to do so.
I have a customer that wants to send emails using Exim and SMTP (using outlook), withouth authentication. Now.. the big question is ... how can I configure the Exim server to work withouth any authentication?
I know the risks of this withouth any authentication, but is my customer's server and he want to work in this way.
He is also asking if he is able to send emails withouth authentication using SMTP for certain IP addresses.. is that possible? Can be done for only 1 domain, or for the entire server?
someone is sending spam using my smtp on qmail. I have authentication on sending messages, but my host company is complaining about spam messages that are sending to numerous emails. is there any solution? or how to fix that...
I have been able to get my server to notify me fast enough so I can delete the account and all he messages sent by that user fast enough. Taking to long might result in getting blacklisted, etc..
So, my question is, how can I prevent something like this? Isn't there a way to completely disable mail for an account (cPanel server) so they can't send mail in the first place? Or, is there a way to somehow silently discard all the eMail sent by a user in a specific group?
I currently have a dedicated server, Linux, with 1 website on it that is sending spam.
At first I thought it was someone spoofing my email address, however when I check my servers Email queue I can see the spam emails in there being sent.
My problem is that I have contacted my server provider and support for the scripts I'm running and everyone is saying its the other persons fault. My server provider is saying everything is up to date and it must be a software exploit on one of my scripts, and the support team from my software is saying its not them that its the server.
i have been receiving lot of spam emails with from and to address being the same email of my domain with content being "click here to see web page" or an image link of viagra shop seen. sometimes it is sent with title "delivery status failure"
i checked the mail headers and it seems that they do not originate with contact form since i used captcha to protect them.
Yesterday my mail logs started showing many a spam email being sent from my server. There isn't anything mission critical running on it, so I took down qmail until I could find the vulnerability and fix it. But try as I might, I haven't found any conclusive vulnerability, so I thought to ask here where someone with more experience might spot something obvious that I've missed (I'm still somewhat new to this).
Anyway, the qmail logs show that the messages came from uid 48, apache. Log excerpt (sending of first spam mail):
Aug 28 11:10:51 host qmail-queue: mail: all addreses are uncheckable - need to skip scanning (by deny mode) Aug 28 11:10:51 host qmail-queue: scan: the message(drweb.tmp.TNDOi2) sent by anonymous@HOSTNAME to SPAMADDRESS should be passed without checks, because contains uncheckable addresses Aug 28 11:10:51 host qmail: 1188295851.742521 new msg 51970054 Aug 28 11:10:51 host qmail: 1188295851.742679 info msg 51970054: bytes 445 from <anonymous@HOSTNAME> qp 8057 uid 48 Aug 28 11:10:51 host qmail: 1188295851.752799 starting delivery 460: msg 51970054 to remote SPAMADDRESS Aug 28 11:10:51 host qmail: 1188295851.752933 status: local 0/10 remote 1/20
Unfortunately, my Apache logs have no entries around the time when these messages were sent. There are some suspect "CONNECT" requests scattered throughout the logs, but all are denied with 405's, and none correspond exactly with the time of the spam. Example (from about 3 hours after the spam):
(The fact that the final query wasn't denied worries me slightly though. Does anyone have any insight?)
I'm not sure where to go from here. I'm concerned about the lack of logs by Apache. There's a nine hour period without any entries; not unusual for my server given that its not very active, but the time when the spam was sent falls in this time period. I've checked for common security issues, but qmail is configured only to relay from localhost, and Apache isn't configured as an open proxy. Are there any other common issues I should check for? Is there any other information I should post here to help identify the problem?
I'm running Apache version 2.0.52, and qmail 1.03.
I'd be very grateful for any help or links to relevant HOWTOs.
My server is being used for sending out spam email using SMTP auth on server. I am failed to recognize it using phpnobody spam.
The email headers are as below:
[root@serverl ~]# /root/qmHandle -m38168420
-------------- MESSAGE NUMBER 38168420 -------------- Received: (qmail 19615 invoked from network); 21 Dec 2007 11:14:02 -0500 Received: from 124-8-103-212.dynamic.tfn.net.tw (HELO lzbldm) (126.96.36.199) by ip-xx-xx-xxx-229.static.priatdns.com with SMTP; 21 Dec 2007 11:14:02 -0500 Message-ID: <003761451621$48031823$28802762@lzbldm> From: =?big5?B?uPKmaL5sqs6m17uh2VTZVA==?= <email@example.com> To: <firstname.lastname@example.org>, <email@example.com>, <firstname.lastname@example.org>, <email@example.com>, <firstname.lastname@example.org>, <email@example.com>, <firstname.lastname@example.org>, <email@example.com>, <firstname.lastname@example.org>, <email@example.com>, <firstname.lastname@example.org> Subject: =?big5?B?s2+xTqxPp0GzzKvhpECmuLTuqs4=?= Date: Sat, 22 Dec 2007 00:14:39 +0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0748_01590CDE.19AA17B0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3198 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198
This is a multi-part message in MIME format.
The qmail logs are as below
Dec 23 04:22:02 serverl qmail: 1198401722.886024 end msg 38163426 Dec 23 04:22:02 serverl qmail: 1198401722.886435 new msg 38163440 Dec 23 04:22:02 serverl qmail: 1198401722.886630 info msg 38163440: bytes 5274 from <> qp 21043 uid 2522 Dec 23 04:22:02 serverl qmail: 1198401722.897484 starting delivery 247946: msg 38163440 to remote email@example.com Dec 23 04:22:02 serverl qmail: 1198401722.897706 status: local 0/10 remote 9/20 Dec 23 04:22:03 serverl qmail: 1198401723.035092 delivery 247944: failure: 188.8.131.52_does_not_like_recipient./Remote$ Dec 23 04:22:03 serverl qmail: 1198401723.035296 status: local 0/10 remote 8/20 Dec 23 04:22:03 serverl qmail-queue: mail: all addreses are uncheckable - need to skip scanning (by deny mode) Dec 23 04:22:03 serverl qmail-queue: scan: the message(drweb.tmp.fkOXLe) sent by #@ to postmaster@cl-t061-160$ Dec 23 04:22:03 serverl qmail: 1198401723.192176 bounce msg 38163423 qp 21076 Dec 23 04:22:03 serverl qmail: 1198401723.192241 end msg 38163423 Dec 23 04:22:03 serverl qmail: 1198401723.193683 new msg 38163429 Dec 23 04:22:03 serverl qmail: 1198401723.193930 info msg 38163429: bytes 5878 from <#@> qp 21092 uid 2522 Dec 23 04:22:03 serverl qmail: 1198401723.220191 starting delivery 247947: msg 38163429 to local 9-postmaster@cl-t061-$ Dec 23 04:22:03 serverl qmail: 1198401723.220247 status: local 1/10 remote 8/20 Dec 23 04:22:03 serverl qmail-local-handlers: starter: submitter with error code 100 Dec 23 04:22:03 serverl qmail-local-handlers: mailsend: wait for submitter failed Dec 23 04:22:03 serverl qmail-local-handlers: cannot reinject message to mail system Dec 23 04:22:03 serverl qmail: 1198401723.270544 delivery 247947: failure: This_address_no_longer_accepts_mail./ Dec 23 04:22:03 serverl qmail: 1198401723.270720 status: local 0/10 remote 8/20 Dec 23 04:22:03 serverl qmail: 1198401723.270863 triple bounce: discarding bounce/38163429 Dec 23 04:22:03 serverl qmail: 1198401723.270906 end msg 38163429 Dec 23 04:22:03 serverl pop3d: Dec 23 04:22:03 serverl qmail: 1198401723.821852 delivery 247946: failure: 184.108.40.206_does_not_like_recipient./Remote$ Dec 23 04:22:03 serverl qmail: 1198401723.821918 status: local 0/10 remote 7/20 Dec 23 04:22:03 serverl pop3d: IMAP connect from @ [220.127.116.11]INFO: LOGIN, user=support, ip=[18.104.22.168] Dec 23 04:22:03 serverl qmail-queue: mail: all addreses are uncheckable - need to skip scanning (by deny mode) Dec 23 04:22:03 serverl qmail-queue: scan: the message(drweb.tmp.Ge7OVb) sent by #@ to postmaster@cl-t061-160$ Dec 23 04:22:04 serverl qmail: 1198401724.007097 bounce msg 38163440 qp 21226 Dec 23 04:22:04 serverl qmail: 1198401724.007177 end msg 38163440 Dec 23 04:22:04 serverl qmail: 1198401724.008599 new msg 38163295 Dec 23 04:22:04 serverl qmail: 1198401724.008829 info msg 38163295: bytes 5837 from <#@> qp 21240 uid 2522 Dec 23 04:22:04 serverl qmail: 1198401724.042842 starting delivery 247948: msg 38163295 to local 9-postmaster@cl-t061-$ Dec 23 04:22:04 serverl qmail: 1198401724.042898 status: local 1/10 remote 7/20 Dec 23 04:22:04 serverl qmail-local-handlers: starter: submitter with error code 100 Dec 23 04:22:04 serverl qmail-local-handlers: mailsend: wait for submitter failed Dec 23 04:22:04 serverl qmail-local-handlers: cannot reinject message to mail system Dec 23 04:22:04 serverl qmail: 1198401724.089046 delivery 247948: failure: This_address_no_longer_accepts_mail./ Dec 23 04:22:04 serverl qmail: 1198401724.089108 status: local 0/10 remote 7/20
I tried to grep some more information agains UID but failed: [root@serverl ~]# grep 2020 /etc/passwd alias:x:2021:2020:Qmail User:/var/qmail/alias:/bin/false qmaild:x:2020:2020:Qmail User:/var/qmail/:/bin/false qmaill:x:2022:2020:Qmail User:/var/qmail/:/bin/false qmailp:x:2023:2020:Qmail User:/var/qmail/:/bin/false [root@serverl ~]# grep 2522/etc/passwd
got a 2nd notice from my ISP complaining that spams are being sent from my dedicated box. Since the first notice, I had stopped all the mail-related services (sendmail, mailman, courier-imap), which means no emails will be sent out from this box. However, I still received the 2nd notice for spamming.
own dedicated box running CentOS 4.2 with Plesk 8.1. 1 site hosted on it.
1. Is my box hacked in and hijacked to send out spam? If yes, how can I check for system integrity?
2. Based on the service status dump, is there something else I need to do in the meantime to stop the box from sending out spam?
3. If there's someone who willing to help out, I'm willing to pay a small amount (~$50, sorry I'm broke!) to fix the server and just kinda help me through the process.
I'm having an issue with email generated from a website contact form. The email is being sent from the website via php. The issue is that the email address that it is being sent to is a domain/website that is also on cpanel. It is trying to deliver it to a local account, but the email is acutally on a third party system outside of cpanel. Does anyone know anyway for exim to not try and deliver locally?
whether our webhost has their configuration messed up, or if this is not genuinely possible with cpanel + exim + shared hosting.
Our email server is hosted with the web host, and what we want to do is to not allow certain users to be able to receive (And send) outgoing email to non-local domains e.g. they should only be able send and receive within our hosted domain, @mydomain.com .
Now, we've tried doing this using cpanel's user level filters and have setup the following:
Rules: If Field To does not contain @mydomain.com OR If Field From does not contain @mydomain.com
Fail with message.
We've tested these filters using combinations and they seem to be working as far as we can see on cpanel (it has the filter testing feature)
Now this works for people sending emails into our domain e.g. someone from hotmail tries sending emails to a user, and it bounces back.
But people from inside the domain can send emails to other domains even when they give valid results on the cpanel filter tester.
Hoping someone can help here. I have a web server running a couple of sites, has been for a couple of years now. With one of the domains, I have an email forwarder setup through cpanel to forward mail sent to a specific address at that domain to my gmail account (it's a "contact us" type address). I don't think the email address is listed on the web anywhere.
Anyway, I am noticing a lot of spam emails being sent to that address, from that same address and they all appear to be relayed through my exim server legitimately. Obviously they aren't (as I am not sending them).
I am only familiar with sendmail, and am unsure about where to look for any possible hacks to my exim server. Can someone point me in the right direction? I want to stop these spam messages being sent, asap.