|
| |
| | Open mail relay - Wikipedia, the free encyclopedia |
 | | The most famous open mail relay operating today is probably that of John Gilmore, who argues that running an open relay is a free speech issue. | | | An open mail relay is an SMTP (email) server configured in such a way that it allows anyone on the Internet to relay (i.e. | | | It was cheaper and simpler for email to be passed from computer to computer until it reached its destination than to connect directly to the target computer (e.g. |
|
http://en.wikipedia.org/wiki/Open_mail_relay
(871 words)
|
|
| |
| | open relay - a Whatis.com definition - see also: insecure relay, third-party relay |
| | In the past, open relays were used intentionally, for example, to facilitate mail relay between the separate closed e-mail systems (such as UUCP or FidoNet) or to allow network administrators to debug mail connectivity issues and route mail around known problems. | | | By processing mail that is neither for nor from a local user, an open relay makes it possible for an unscrupulous sender to route large volumes of spam. | | | The Mail Abuse Prevention System (MAPS) is one of several organizations that seeks to control the problem of open relays, though educating the public about the danger, and through publishing a blacklist of organizations whose mail hosts allow third-party relays. |
|
http://whatis.techtarget.com/definition/0,,sid9_gci782509,00.html
(519 words)
|
|
| |
| | Open Relay Database - FAQ |
| | When mail is relayed through a mailserver which causes it to be listed in the ORDB.org zone, we store the headers of the relayed mail in a database so that the administrator of the misconfigured mailserver can see how it was possible to trick his/her MTA into relaying. | | | The point is, even if your software vendor claims that they are right and we are wrong about your server being an open relay, you should probably have a look at http://ordb.org/lookup/, which will show you the headers of the probe that your server relayed for us. | | | An open mail relay occurs when a mail server processes a mail message where neither the sender nor the recipient is a local user. |
|
http://www.ordb.org/faq
(6321 words)
|
|
| |
| | The qmail newbie's guide to relaying |
| | An SMTP server is an "open relay" if it agrees to relay mail no matter who's sending it--if another host connects to port 25 with some mail, an open relay will accept and try to deliver it no matter what its destination is and no matter who is sending it. | | | This might be another mail server running qmail, sendmail, or some other mail transfer agent, or it might be an end user, who wants to send mail from his desktop mail client. | | | The relaying server may even find itself blacklisted, so that other hosts on the Internet will refuse to receive mail from it (see http://www.ordb.org, for example). |
|
http://www.palomine.net/qmail/relaying.html
(1333 words)
|
|
| |
| | trimMail Inbox Anti-Spam Appliance: Spam Filtering, Content Filtering Protects E-Mail |
| | Open relaying with a properly configured trimMail Inbox in place is not possible. | | | There is no software to install, and you don't need to make any changes to your existing mail server. | | | With trimMail Inbox, spam scoring, quarantining, auto-deletion, white listing, and black listing are all configurable on a global, domain, and user basis. |
|
http://www.trimmail.com
(529 words)
|
|
| |
| | Pentagon Email Relays in SMTP Census |
| | For almost all of the relayed emails received by the author, it was possible to reply to the responsible persons of the systems affected. | | | With the present data and using the more conservative value of 50 relayed emails actually received, 50 of 3228 or 1.55% were demonstrated to be email relays. | | | However, in almost all cases, the headers of the relayed email and other research sufficed to produce a valid email address to contact the responsible parties for the open email relay servers found. |
|
http://www.angelfire.com/space/netcensus/smtp.html
(2606 words)
|
|
| |
| | Open Mail Relays |
| | Complaints regarding open mail relays (OMR) are classified as security issues and should be reported to the Network Operations Center (NOC) at noc@cornell.edu. | | | The system administrator will be informed that a block of outgoing/off-campus mail from the offending OMR could be implemented at the discretion and request of Security staff at any time after verifying the existence of the open relay. | | | These links lead to sites with useful information regarding the remediation of open mail relays as well as discussions of current third-party relay issues. |
|
http://www.cit.cornell.edu/computer/security/openmail.html
(557 words)
|
|
| |
| | Allowing Relaying in SMTP: A Series of Surveys |
| | This is the place where most SMTP servers that do not relay are expected to return an error code because it is the first place where the SMTP server can be sure that the message was not meant for local delivery to the system. | | | This is where the majority of servers that would not relay did, in fact, give the result code that would reject relaying. | | | An open relay would actually send the message to the address in the "To:" header. |
|
http://www.imc.org/ube-relay.html
(1132 words)
|
|
| |
| | Relaying Denied/Allowed (in sendmail 8.8/8.9-8.12) |
| | is wrong, then the system may open up relaying for other hosts in that domain. | | | There may be some problems even though you've added the relevant entries to a file or to a class. | | | ) about the blocked relay attempts in the logfile and check which case applies to you. |
|
http://www.sendmail.org/~ca/email/relayingdenied.html
(605 words)
|
|
| |
| | [No title] |
| | Sure enough, there was a host on their network, loaded with software from that outfit in Redmond, and happily spewing relayed mail. | | | Getting junk e-mail relayed through the FAA might be just an annoyance, but it might also point to other security issues there. | | | (I tested whether it would relay mail from anywhere to anywhere else by telneting to its smtp port.) Furthermore, to get on this exclusive RBL list, the e-mail relay must've been in operation for some time. |
|
http://www.politechbot.com/p-02757.html
(597 words)
|
|
| |
| | Grinch - an open mail relay checker |
| | In case a host is not an open relay, return this as error code. | | | If the mail returns, the suspected host was verified as an open open relay and will be rejected until its cache entry times out. | | | The goal is to check "on the fly" whether a host accepts mail to a given destination it actually may not relay for. |
|
http://www.zonque.org/projects/grinch
(1149 words)
|
|
| |
| | Change in Open Mail Relay Affects Some E-mail Users |
| | Open mail relays such as Ohio State's are SMTP (Simple Mail Transport Protocol) e-mail servers that allow any Internet host to "bounce" mail through them to other Internet mail addresses. | | | The Office of Information Technology reversed its open mail relay policy on Tuesday, February 27, 2001 to improve OSU's e-mail accessibility. | | | Open Mail Relay Background Information: Why We're Reversing the Policy |
|
http://www.net.ohio-state.edu/openrelay
(600 words)
|
|
| |
| | CommuniGate Pro: Protection |
| | The SMTP module uses the Router after it parses the Mail From address. | | | Basically, only your own users should be able to use your Server to relay mail to other places on the Internet. | | | Many bulk mailing lists are sorted by the domain name, and as a result many spam messages come to your site addressed to several recipients. |
|
http://www.stalker.com/CommuniGatePro/AntiSpam.html
(4577 words)
|
|
| |
| | incidents 2003/03: Re: Open mail relay surge |
| | Let me relay an edited follow-up I finished yesterday tracking a local spamming source in our dorms that turned out to be a similar proxy that matched Dex's description. | | | We have seen them in Win98, 2000 and XP computers. | | | Reply: Christopher Cramer: "Re: Open mail relay surge" |
|
http://lists.jammed.com/incidents/2003/03/0044.html
(672 words)
|
|
| |
| | Open Mail Relay Software: S-Agent – secure plug-in for any email client; Stop spam, mail bombs, and relaying at the .. |
| | Open Mail Relay Software: S-Agent – secure plug-in for any email client; Stop spam, mail bombs, and relaying at the.. | | | Meet your proxy, mail, and news server needs with one package. | | | mail preview, program, open, top software, spam, preview, delete, mail, before |
|
http://www.soft411.com/software/open-mail-relay_2.html
(414 words)
|
|
| |
| | Is Your Exchange Server Relay-Secure? |
| | A system must be able to restrict unauthorized use as a mail relay. | | | For example, if mail comes into joe@dec.com, the system rewrites the address as joe@compaq.com and sends the message on to the compaq.com mail host. | | | Is there any ways to restrict relaying so that only those messages with a sender or receipient on the local system will be relayed? |
|
http://www.exchangeadmin.com/Articles/Index.cfm?ArticleID=7696
(3089 words)
|
|
| |
| | Exchange Server: Open Mail Relay |
| | Check the box beside" Allow all computers which successfully authenticate to relay..." If you have an SMTP connector setup for the * address space, make sure "Allow messages to be relayed to these domains" is NOT checked on the Address Space tab. | | | Is it okay to delete the mail that is in my badmail directory, that keeps filling up with thousands of files | | | If you want more information about open mail relays try here http://www.ordb.org/ |
|
http://www.experts-exchange.com/Networking/Email_Groupware/Exchange_Server/Q_20647252.html
(400 words)
|
|
| |
| | Knowledge Base: Open Mail Relay protection |
| | altohiway mail servers (being the mail relay for the customer in a lot of cases) may also be blacklisted which then affects other customers | | | The abused mail system becomes jammed, unstable or possibly crashes and requires substantial amounts of work to bring back online. | | | In addition you can also look at the MAPS website which is a valuable source of information on securing all manner of systems. |
|
http://www.altohiway.com/knowledge/53.html
(366 words)
|
|
| |
| | Verio censored John Gilmore's email |
| | We have given you plenty of time to fix this mail relay, and it is obvious that you refuse to do so. | | | An open relay takes any email that you send it, and forwards it toward its destination. | | | An open router takes any packet that you send it, and forwards it toward its destination. |
|
http://www.toad.com/gnu/verio-censorship.html
(3143 words)
|
|
| |
| | Qmail - Help clearing up open mail relay - linux newbie |
| | I have a problem with my mail system.... | | | am running an open mail relay, I checked, apparently they are correct. | | | Qmail - Help clearing up open mail relay - linux newbie |
|
http://www.webservertalk.com/archive66-2004-1-48183.html
(530 words)
|
|
| |
| | open mail relay software |
| | This testing tool allows users to scan and check their open relay servers. | | | third party relay, mail relay, open mail relay, blind open relay, smtp relays, open relays, network tool, | | | The program lets you analyze and search a selected document for specified data, and convert the unstructured results into a text file for further processing in a spreadsheet application like Microsoft Excel and Mailing List Express. |
|
http://www.cutedownloads.com/two/open-mail-relay.htm
(378 words)
|
|
| |
| | Secunia - Advisories - Barracuda Spam Firewall 200 Open Mail Relay Vulnerability |
| | The problem is that white-listed senders can use Barracuda Spam Firewall as an open mail relay regardless of what domains Barracuda Spam Firewall is configured for. | | | Sean Sosik-Hamor has reported a vulnerability in Barracuda Spam Firewall 200, which can be exploited by malicious people to use it as an open mail relay. | | | Secunia - Advisories - Barracuda Spam Firewall 200 Open Mail Relay Vulnerability |
|
http://secunia.com/advisories/14243
(258 words)
|
|
| |
| | ILUG Historical Archive: [ILUG] open mail relay..... |
| | R$*< at domain $*>$* $#error $ at domain 5.7.1 $: 550 we do not relay | | | Reply: Lars Hecking: "Re: [ILUG] open mail relay....." | | | Maybe reply: Kenn Humborg: "RE: [ILUG] open mail relay....." |
|
http://www.linux.ie/old-list/8460.html
(604 words)
|
|
| |
| | [No title] |
| | There are a number of scenarios where a sender from outside mynetworks might legitimately have an envelope-sender address in (one of) your domain(s). | | | Note that results of RBL lookups are cached, so these are cheap to evaluate multiple times. | | | "Sender" is the envelope-sender address (SMTP "MAIL FROM"), not the client machine's IP address or host name, or the "From:" field in the headers. |
|
http://jimsun.linxnet.com/misc/postfix-anti-UCE.txt
(5903 words)
|
|
| |
| | [No title] |
| | In other words, an open relay mail server processes a mail message where neither the sender nor the recipient is a local user. | | | Sender is a known local user from local host; and some mail servers are configured to always allow mail from "postmaster" | | | An "open relay" is a server that allows third-parties (non-customers) to send mail to other third-parties. |
|
http://www.reedmedia.net/misc/mail/open-relay.html
(202 words)
|
|
| |
| | Dangerous Bobax Worm Hits System Files |
| | Bobax is a little more dangerous than Sasser, as it deletes and changes system files and sets up an open e-mail relay to send spam from a victim's machine. | | | The Gaobot and Wallon worms also attempt to exploit Windows vulnerabilities from earlier security bulletins. | | | See how EMC's backup solution helps Blue Rhino. |
|
http://www.extremetech.com/article2/0,1558,1601463,00.asp
(654 words)
|
|
| |
| | Closing Open Mail Relay |
| | relay after complaints to them from Microsoft amongst | | | >relay after complaints to them from Microsoft amongst | | | checkbox for all authenticated users allowed to relay. |
|
http://www.winserverkb.com/Uwe/Forum.aspx/sbs/6044/Closing-Open-Mail-Relay
(182 words)
|
|
| |
| | Re: Checking for open mail relay |
| | > can't see how, which suggests I'm running an open mail relay. | | | > Is there any way of independently verifying if it is an open mail relay? | | | Submit your own IP to ordb.org and see if it lists you. |
|
http://www.mailarchive.ca/lists/comp.mail.sendmail/2004-03/1222.html
(138 words)
|
|
| |
| | Open Mail Relay E-Mail Client - Pegasus Mail |
| | In the Pegasus Mail program, click the File menu. | | | In the Properties window, find the field labeled SMTP host. | | | Open Mail Relay E-Mail Client - Pegasus Mail |
|
http://www.csus.edu/saclink/faq/emailclients/pmail.stm
(79 words)
|
|
| |
| | SecuriTeam.com ™ - Formmail.pl Can Be Used As An Open Mail Relay |
| | Formmail.pl Can Be Used As An Open Mail Relay | | | SecuriTeam.com ™ - Formmail.pl Can Be Used As An Open Mail Relay | | | The CGI program Formmail.pl lacks adequate security checks and allows spammers to send anonymous e-mail using vulnerable host as mail relays. |
|
http://www.securiteam.com/securitynews/5KP0C2K3PM.html
(291 words)
|
|
| |
| | Viruslist.com - Open relay |
| | Open relay is a term used to describe mail servers that allow unauthorised users to send email through them. | | | Unfortunately, there are still enough open relay servers available on the Internet for hackers and spammers to use them to send malware and spam. | | | Most contemporary mail servers do not, and most enterprises are aware of the security issues involved and also do not support this practice. |
|
http://www.viruslist.com/en/glossary?glossid=153949388
(101 words)
|
|
| |
| | Third-Party Mail Relay (Open Relay) and Microsoft Exchange Server |
| | Third-Party Mail Relay (Open Relay) and Microsoft Exchange Server | | | Reading Room Home / Category Home SANS Information Security Reading Room: Over 1585 original computer security white papers in 71 different categories. | | | This papge requires a browser that will support in-line frames. |
|
http://www.sans.org/rr/toppapers/open_relay.php
(41 words)
|
|
| |
| | adoption Directory: Open Adoption |
| | enCommerce Facilitates Rapid Adoption of Open PKI getAccess to Integrate with VeriSign OnSite and Leading LDAP Directories from IBM, Novell and Netscape 19 Jan 1999 RSA Data Security Conference, San... | | | Learn more about: LISTSERV email list management software ï LISTSERV Maestro email marketing software OPEN-ADOPTION@HOME.EASE.LSOFT.COM Open Adoption List (formerly BRTHPRNT) List name: OPEN-ADOPTION... | | | open adoption Promotes Open of Software Source Open birthmother letter birthmother easy-going, honest and open marriage open relay mail through open adoption. |
|
http://www.adoptionglobe.com/openadoption
(1074 words)
|
|
| |
| | US-CERT Vulnerability Note VU#814617 |
| | Sendmail shipped with IBM AIX is configured by default as an open mail relay. | | | Sendmail is a widely used mail transfer agent (MTA) that is included with IBM AIX. | | | This configuration is called an "open relay" and such systems are frequently abused to deliver unsolicited commercial email (UCE) or SPAM. |
|
http://www.kb.cert.org/vuls/id/814617
(264 words)
|
|
| |
| | Debian: cgiemail Open mail relay - The Community's Center for Security |
| | Debian: cgiemail Open mail relay - The Community's Center for Security | | | - --------------------------------------------------------------------------------- For apt-get: deb http://security.debian.org/ stable/updates main For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main Mailing list: debian-security-announce@lists.debian.org Package info: `apt-cache show | | | If you are using the apt-get package manager, use the line for sources.list as given below: apt-get update will update the internal database apt-get upgrade will install corrected packages You may use an automated update by adding the resources from the footer to the proper configuration. |
|
http://www.linuxsecurity.com/content/view/105726/100
(284 words)
|
|
| |
| | Open Mail Relay Restriction Information |
| | However, we found that our e-mail servers were used by non-CSUS entities to distribute thousands of unsolicited e-mail messages (spam) to numerous sites on the Internet. | | | Open Mail Relay allows e-mail servers to accept and route mail from and to users and networks not associated with the server's domain. | | | Thus, it was decided by a group of campus-wide program center administrators, faculty, and staff representatives that CSUS e-mail servers restrict Open Mail Relay services and only accept outgoing mail originating from or incoming mail addressed to CSUS resources. |
|
http://www.csus.edu/saclink/faq/OpenMailRelay.stm
(790 words)
|
|
| |
| | slug.archive.0106: [SLUG] Open mail relay? |
| | You can clearly see the superfreeway.com relayed the mail. | | | of the web based relay testers, and they all agree that relaying will be | | | I have telneted to sendmail directly, and cannot get my sendmail to relay |
|
http://slugarchives.nks.net/List/slug.archive.0106/0189.html
(514 words)
|
|
| |
| | Re: Open mail relay - again |
| | : Richard Whelan: "Re: Open mail relay - again" | | | > I have just sent the mail to the sendmail-questions_at_sendmail. | | | : Steph L: "Re: adding sig to ALL outgoing mail" |
|
http://www.mailarchive.ca/lists/comp.mail.sendmail/2003-11/0121.html
(181 words)
|
|
| |
| | Mail relay testing |
| | You must be a registered abuse.net user, and the relayed message will be addressed to you. | | | This can report false positives, hosts that appear to be open relays but actually aren't because they reject or discard a message after appearing to accept it. | | | Registered user mode attempts to relay a message through the server to be tested. |
|
http://www.abuse.net/relay.html
(269 words)
|
|
| |
| | RelayTest - Test the open relay vulnarebility of your mail server. |
| | RelayTest - Test the open relay vulnarebility of your mail server. | | | It runs series of tests designed to detect open relays and create a detailed report of the findings. | | | Test the open relay vulnarebility of your mail server. |
|
http://www.digiarch.org/relaytest.html
(114 words)
|
|
| |
| | slug.archive.0106: Re: [SLUG] Open mail relay? |
| | In reply to: Aharon: "[SLUG] Open mail relay?" | | | Previous message: herrold: "Re: [slug] [SLUG] Open mail relay?" |
|
http://slugarchives.nks.net/List/slug.archive.0106/0195.html
(143 words)
|
|
| |
| | Open Mail Relay |
| | Microsoft Exchange 5.5 will act as an open relay if it is not configured otherwise. To close the open relay run the Exchange Administration program. Open the configuration, connections container (see below) and double click on the Internet Mail Service. | | | When the Internet Mail Service (Mail) Properties Window opens, click on the Routing tab (see below). | | | If you are using your Exchange sever as a POP3 or IMAP4 server you may need to make changes on your Outlook Express or Outlook clients. If that is the case, click on Additional Changes for Outlook Express. |
|
http://techsupport.dadeschools.net/Open%20Mail%20Relay.htm
(94 words)
|
|
|
