Server :: Left Exim4 As Open Relay, Got Reported As Spam?
Apr 19, 2011
I set up an exim4 server successfully and was able to send/receive mail! I fired off a couple emails to my friend and never got a response. Oh well, I thought, must be because my domain name might be considered spam.Flash forward to today and I get an email from the people who host my server, telling me that I have left my exim4 relay open. Looking through some of my users' email, I see a series of messages with the subject 'Message frozen':
Code:
Message 1QCCQJ-0004FP-OY has been frozen (delivery error message).
The sender is <>.
[code]....
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Jul 25, 2011
Because our visitors/customers are short term, and may be configured incorrectly with their own mail servers we automagically redirect all port 25 traffic going to internal IP's to our own mail servers while on our network.(postfix on centos 5.6)While I have taken some measures to prevent it from spamming, I would greatly appreciate some assistance.I will be putting in clamav, but I haven't configured it yet with the mail.I am using postfix, but can also put on procmail or even spam assassin
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Jan 12, 2010
I all ready have a Debian spam filter setup using Postgrey, Postfix, Amavis-new, spamassassin, and ClamAV this box is a relay spam filter server to our SBS Exchange Box. Currently all Virus laden email is disposed of, and all spam that is not thrown out gets sent to a spam filter account on the exchange server that I check periodically. This is inefficient and I'd rather not do this, additionally I'd like users to have control over their own white lists and so forth.
I am willing to start from scratch on this as the spam filter is running in a VM environment I can plug a new one in and be running in minutes. The issue I am having is that I cannot find any information on how to do this. Plenty, including HOWTOs, on how to do this with local users on the spam box and also have it relay to another server, but not how to make quarantine folders for relay recipients that are access
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Apr 16, 2011
I'm setting up a mailserver for my domain.I'm seeing relay rejections in the mail.logbut I'd like to have external validation that nothing bad is exiting the domain beforeI wind up on blacklists
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Apr 30, 2009
I just setup SpamAssassin and what not following this tutorial
[URL]
I am using CentOS 5.3. I was half way through that and got an email that had ***SPAM*** in the subject. Haven't received any more. First of all I want to know if spam will still get delivered, and just have a modified subject. Second, I want to know how to set it up so Spam goes to a user's spam mailbox (Virtual Users). And third of all, is it possible to disable spam filtering on a user basis, preferably using MySQL tables? Is it possible for users to mark a message as spam, and all further messages sent from that address will be sent to spam folder but only for that user?
EDIT: Yes spam is getting delivered with a modified header, on the server site, how can i deliver to spam folder? how to create IMAP virtual mailboxes on request without having to send an email to them first? Using virtual users with Courier Imap
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May 7, 2010
When installing these progs on Lucid it comes with exim4,I noticed this in the terminal output. What has exim4 to do with rkhunter and/or chkrootkit?
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Aug 25, 2009
I currently have the following email server set up:
Postfix with mysql backend
Dovecot
clamav
spamassassin
amavisd
And it all works great. However I would like it for amavisd to forward all the marked spam into a folder on each user account, but I cannot figure this out.
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Apr 20, 2010
is there a way to have gnome open in the upper right or left corner instead of the lower left corner when i start it?
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Jun 11, 2010
has a small company with an opensuse linux computer and their ISP just told them that something's sending spam. The person who set this computer up is long since gone. They don't know anything about linux and have no idea what programs are on there.How would I figure out:
1. If there's an emailing program on there
2. Whether it's sending or capable of sending spam
3. Lock it down
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Oct 11, 2010
Strange issue here when trying to verify firewall on Server 8.04. No ftp service running at all on server, but both nmap and netcat report port 21 as being open, even though it isn't.I am 100% sure that port 21 is not actually accessible and iptables rules are fine. Trying to connect to the port fails, yet nmap and netcat seem to report a "false positive"?Have also checked on a number of other servers I'm running, and this "false positive" seems to apply to all of them.
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Nov 17, 2009
I have tried code...
I have tried to install exim4 and then to purge exim4-daemon-light but
that fails too.
How do I get rid of all exim4 stuff?
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Jun 3, 2011
I installed exim4 package on my debian server as MTA. Now I want to send mail with this by SMTP. But when I connect to this via telnet, it returns this banner:
Code:
220 *******************************************************
And when I try to execute a command like EHLO, it says:
Code:
500 unrecognized command
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Apr 30, 2011
Here is the senario...
2 round robin dns servers
x.x.x.1 mydomain.com (hostname)
x.x.x.2 mydomain.com (hostname)
My problem is that when I try and send an email that is part of the domain, it ends up trying to deliver it locally. I realize it is supposed to, but I don't want that for non-users of the server.
I want to be able to deliver certain emails []@mydomain.com remotely. (info@mydomain.com)
exim4 setup "internet site; mail is sent and received directly using SMTP". This works well as long as it is not an email from mydomain.com.
Is there a way to have exim check the users first and then deliver based on local user or not?
Next question. Is having the domain name as the hostname the best way to setup a round robin? (web server)
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Jul 27, 2011
I am using postfix as spam Mailscanner to protect my mail server running sendmail. The problem is that when I forward an email from MailScanner mail me back with the following error:
<postmaster@localhost.@mydomain.com.>... Real domain name required for sender address (in reply to MAIL FROM command))
Jul 27 13:15:59 smtp postfix/local[28465]: C68AC1000001: to=<root@smtp.mydomain.com>,
[code]....
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Aug 16, 2010
After installing postfix on my server , all emails sent by a PHP class that i built , are received to spam folder , no matter what i do .am not an expert , except in PHP , the class i built works fine everywhere else except on this server , so i think the problem might be from the server it self ?some told me wrong configuration/software on my server , others told me wrong DNS stuff . actually i don't understand the DNS stuff , and am not an expert in linux softwares and services but i cann install/configure them , so could anyone please check the DNS for problems ?
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Nov 2, 2010
I inherited a centos 5.2 server at my work. I didn't know anything about it when I got it except that the fate of the organization rested on my ability to manage it. I've gotten along fine with it. I don't really like it, but it mostly works. I learned a lot in the process. Anyway, I went bought some more ram for the box because, hey, it's a server and it will serve faster with more RAM. So it had 3x512mb and I took out one of the 512mb and put in 2x1gb (it's only got four slots). I rebooted and and top reports 1585152k of ram. It should be 3gb. So I haul out a monitor and keyboard because I want to see if the BIOS sees more. Sure enough, on boot I arrive at a grub/centos boot screen and it says somewhere that I have 3gb, I boot and top still reports 1585152k.
How do I make this computer realize it has more RAM?
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Feb 2, 2011
I am having a strange problem on my private nameservers registered with godaddy. There are around 10 domains right now which are using my nameservers ns1 & ns2. After the setup of my nameservers, domains. I checked that the domains are resolving good to the mentioned IP addresses which I mentioned in the zone files but when I am checking the domains on it is showing "Missing nameservers reported by parent" error. I don't know why it is reporting me this error.For example I checked one of my domains spurstone.com & I got the above mentioned error. Although whois database is giving correct results with nameservers NS1.INDEPENDENTADVISORONLINE.COM & NS2.INDEPENDENTADVISORONLINE.COM
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Mar 22, 2011
I want to find the mib files where the OIDs used in snmpd are. Where can I find those mib files?
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Apr 16, 2010
Amavis-new on my mail server is marking my emails as spam, like so:
Quote:
Apr 16 12:15:52 myserver amavis[30979]: (o3GIFltt008868) Blocked SPAM, AM.PDP-SOCK [xx.xx.xx.xx] [xx.xx.xx.xx] <myemail@mydomain.com> -> <myfriend@hisdomain.com>, quarantine: spam-w1hxRn9Pr4P6.gz, Message-ID: <4BC8A9E8.2070108@mydomain.com>, mail_id: w1hxRn9Pr4P6, Hits: 7.844, size: 6763, 1986 ms
The mail server is not on my local LAN, and all the primary users are roaming. They connect via TLS auth, which is required to make a sendmail connection to my server. I could whitelist all addresses in my domain, but then anyone spoofing my email wouldn't be seen as spam. How do I simply tell amavis-new and/or sendmail not to spam scan TLS authenticated users?
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Apr 24, 2011
i need to configure postfix on centos to relay email from the internet to the Exchange Server and i also need that emails sent from the exchange within the same domain be sent to postfix then resent to exchange because i have spamassassin and clamav installed on centos to filter all incoming and outgoing mails ...
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Jul 3, 2011
We have a vpn that is accessible to anyone. We already block port 25, 587 and 465. But I am still receiving spam reports. I believe that the users of my vpn is infected by a virus or something that sends spam. Are there any other ways that spammer send spam mails without using the smtp ports?
My guess is that they are trying to send it by accessing a webmail. Have you heard of anything like that? how to block spam?
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Jan 31, 2010
I've got a server set up with Debian. The problem is that my ISP doesn't allow usage of port 25 (as I understand a lot of ISP's don't).I have PHP scripts hat use the mail() function to send e-mails through the Sendmail application.So, my question is: How can I relay messages sent to sendmail to an external SMTP server (like Google Mail, for example)? Would this be easier to do in the PHP configuration, or on the Sendmail side of things?I've used PEAR extensions in PHP to achieve this before, but scripts downloaded from the Internet generally just use the basic mail() function, and it would be a real pain to modify them all.
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Oct 27, 2010
Have read a whole bunch of threads from how and troubleshooting but still having problems.Was thrown a box configured by someone who resigned today. Need to get mail from the box outbound via SMTP relay off our exchange server.
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Feb 4, 2010
I have a mail server (dovecot+postfix) on Centos with amavis/clamav installed and working. It correctly identifies spam as such and puts it in the headers. I want it to move those suspected spam messages into a spam folder. I do have this working on an older debian server that I didn't setup. If someone could point me in the direction if where that config might be. I can't find it in any of the mail config files.Could there be a seperate package doing this?
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Apr 29, 2011
My issue is that i'm trying to send emails with postfix and gmail as the mail relay,i'm trying to send emails to my self by sendmail -bv user@gmail.com
In the logs, i can understand that it been delivered to the destination,
taken from: /var/log/mail.log:
Apr 30 00:05:23 moni postfix/pickup[10490]: 9C7552170C: uid=0 from=<root>
Apr 30 00:05:23 moni postfix/cleanup[10495]: 9C7552170C: message-id=<20110429210523.9C7552170C@moni.localdomain>
Apr 30 00:05:23 moni postfix/qmgr[10491]: 9C7552170C: from=<root@moni.localdomain>, size=283, nrcpt=1 (queue active)
code....
When login in my gmail account i can't see nothing under the sent / inbox / spam folder.
it's seems like the mail are been sent.. but nothing is happening.
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Feb 24, 2010
There is a centralized FTP server which are accessed by clients to develop some web development project and to achieve this the clients are using ftp service. The problem is when they are trying to copy any files and directories they are getting the following error: "Message reported from the file system: FTP copy not supported,use move instead"
I've checked all the permissions and they are all OK. I don't know why this is happening. they can create and move files and folders but can't copy files and folders.
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Oct 16, 2010
I just saw that my network is slowed so I watches the /var/log/squid/access.log where I get this line continuously....
[Code]....
I thought that someone running any script so I disconnect all my LAN connection (simply removed the local lan cable) but I saw the connections is going on....so I watch the processes on proxy server but nothing suspicious....So I change my static IP and the spamming stops (I say it is spam b'coz the IP 203.188.197.10 is of yahoomail.com ) but I when I am putting my OLD ip back the connection starts again......I want to put back my old static IP b'coz I have configured it for many services. Is there any spyware on my machine or someone configured my IP?
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Dec 19, 2009
I'm setting up email gateway using Postfix, Amavisd-new, ClamAV and SpamAssassin on Opensuse 11.1. Everything seems okie, but I can't have messages with added spam headers, such as:
X-Spam-Flag: NO
X-Spam-Score: 0.233
X-Spam-Level:
X-Spam-Status: No, score=0.233 tagged_above=-10 required=6.6
tests=[ALL_TRUSTED=-1.8, AWL=0.536, BAYES_50=0.001,]
When I try to debug amavis, I can see that SPAM-TAG, <abc@yahoo.com> -> <celeron@domain.com>, No, score=5.406 tagged_above=-999 required=6.2 tests=[LOCAL_DRUG=4, NO_DNS_FOR_FROM=1.407, NO_RELAYS=-0.001] but they don't add to email messages. I've configured amavisd-new with $sa_tag_level_deflt = -999 to add spam headers at all but not successful.
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Jun 2, 2010
I need to implement a form of filtering. Current topology is like so:
Internet -> Smoothwall -> MS Exchange server (w/ OWA) -> Clients
So I need to enable transparent spam filtering on the smoothwall system, which is a full fledged Linux system. There are no 'free' modules available for smoothwall that enable spam filtering. And due to the monetary constraints of the project I'm working on, something free is required.
I don't have any experience with this - I've done a couple of searches and came up with "SpamAssasin", but I can't find any relevant guides that allow transparent scanning - they all assume the mail is stored on THAT server.
So I'm here to ask the more experienced people what sort of packages will enable this functionality? Would like something that has a WebUI, but that's not absolutely necessary.
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Jun 21, 2011
My postfix server has been working great for the last 1-2 years. Lately the number of spams encreased (from 1-2 every day to aprox 8-10 every day per domain for some domains ).I post here the output of postconf -n. Maybe someone gives me some advices about what cat I change or how can I optimize. I must recognise that I don't fully understand details of how postfix and all the restrictions works together, but I will document every advice.
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