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Encyclopedia results for Sendmail

  1. Sendmail

    Infobox software developer Sendmail Consortium, Sendmail, Inc. latest release version http www.sendmail.org ... 2010 02 11 operating system Cross platform genre Mail transfer agent license Sendmail License website http www.sendmail.org Image 6475christieave.jpg thumb Sendmail headquarters in Emeryville in the same building as Jamba Juice . Sendmail is a general purpose internetwork email routing facility that supports ... by Eric Allman , Sendmail is a well known project of the free and open source software and Unix communities ... the original ARPANET delivermail which shipped in 1979 with 4.0 and 4.1 BSD . He wrote Sendmail as a derivative ... mail servers on the Internet ran Sendmail. ref Cite web author D. J. Bernstein url http cr.yp.to ... surveys have suggested a decline, with 29.4 of mail servers in August 2007 detected as running Sendmail ... mxsurvey.html title E Soft MX survey ref Sendmail is trailed by Microsoft Exchange Server .... Allman designed Sendmail to incorporate great flexibility, but it can be daunting to configure for novices. ref Cite web url http www.sendmail.org doc sendmail current doc op op.pdf title Sendmail ... tuning parameters. Sendmail supports a variety of mail transfer protocol s, including SMTP , ESMTP , DECnet s Mail 11 , HylaFax, QuickPage and UUCP . Additionally, Sendmail v8.12 As of 2001 alt as of September ... in each step of the SMTP conversation. New development The next generation of Sendmail was initially called http www.sendmail.org sm X index.html Sendmail X , previously it was called Sendmail 9, but it does not derive from the Sendmail version 8 code base . However, the development of Sendmail X was stopped in favor of a new project called http www.meta1.org MeTA1 . The first release of Sendmail ... on May 20, 2006 under the same license used by Sendmail 8. As of 2010 August development on MeTA1 continues, with the released code at the development stage Pre alpha pre alpha stage. Sendmail 8 releases http www.sendmail.org releases 8.14.4.php Sendmail 8.14.4 2009 12 30 http www.sendmail.org ...   more details



  1. File:6475christieave.jpg

    Summary This office building at 6475 Christie Avenue in Emeryville, California is at the time this photo was taken home to the headquarters of both Jamba Juice and Sendmail . Photographed by user Coolcaesar on January 4, 2009. Licensing Self cc by sa 3.0 GFDL ...   more details



  1. Milter

    fields in the message, etc. The Sendmail Consortium includes a special thread based library in the sendmail ... scale to block, verify and sort incoming mail. Fact date May 2008 MTAs Sendmail Milter was first officially introduced to Sendmail 8.12.0 released on September 8, 2001. Milter was available in sendmail 8.11.x versions as an FFR For Future Release Beta code . Milter has undergone substantial ... NOTES SENDMAIL RELEASE NOTES to know about changes related to Milter in sendmail versions ref http www.sendmail.org ftp RELEASE NOTES SENDMAIL RELEASE NOTES ref . Sendmail 8 s successor, known as http ... release 1.3. Interface The Sendmail Consortium provides a documented Application Programming Interface that can be used to create milters for special needs. The library provided by The Sendmail Consortium is pthread based. However, documentation of the protocol used for communication between sendmail and milter processes is not provided. This internal protocol is subject to changes in new sendmail versions. Sample Milters MIMEDefang j chkmail External links https www.sendmail.org doc sendmail current libmilter docs Milter API documentation http www.sendmail.org doc sendmail current libmilter ...   more details



  1. Internet messaging platform

    and ISPs have generally relied on open source software, like Sendmail, and in house system administrators ... Systems, http communigate.com Critical Path, Inc. IBM Openwave Sendmail, Inc Sun Microsystems ... References references External links Sendmail Consortium, http www.sendmail.org sendmail.org Sendmail, Inc., http www.sendmail.com sendmail.com Milter.org, Sendmail MILTERs http www.milter.org Daniel ..., http www.coruscant.demon.co.uk mike sendmail history.html A brief history of mail cite news url http technetcast.ddj.com tnc program.html?program id 32 title History of Sendmail Interview with Eric ... et al. url http www.sendmail.org gshapiro Sendmail 8.10.Paper.pdf title Sendmail Evolution 8.10 ... con.com read 33904.htm title A Talk with the Father of sendmail publisher LinuxWorld date 2003 08 ...   more details



  1. Eric Allman

    telemarketing firms. In 1998, Allman founded Sendmail, Inc. , headquartered in Emeryville, California , to do Proprietary software proprietary work on improving sendmail . Allman is credited ... Sendmail, Inc. date 2006 08 10 accessdate 2007 08 20 ref and in 2009 he was recognized as a Distinguished ... 11feature.html You ve got Sendmail , Salon.com Salon article about sendmail going commercial December ...   more details



  1. Delivermail

    Unreferenced date December 2009 The ancestor of sendmail , delivermail is a mail transport agent that used the File Transfer Protocol FTP protocol on the early ARPANET to transmit e mail to the recipient. In 1979, when delivermail was first shipped with 4.0BSD and 4.1BSD , the ARPANET was still using Network Control Program NCP as its network protocol . When the ARPANET switched to TCP IP in 1982, the road was paved for Mail transfer agent MTA s that no longer relied on File Transfer Protocol FTP for delivery. The new protocol for sending mail was SMTP , and after Domain Name System DNS replaced hosts file s, delivermail evolved into sendmail , which is still the most widely used MTA on Unix UNIX systems today. Category Message transfer agents Category Mail delivery agents Category Unix internet software Unix stub fr Delivermail ru Delivermail ...   more details



  1. SNDMSG

    Refimprove date December 2009 Orphan date February 2009 SNDMSG existed as a single computer non host, non network electronic mail program from the early 1960s for time sharing operating systems. ref http openmap.bbn.com tomlinso ray firstemailframe.html ref The early versions of SNDMSG allowed users to compose a message that would be stored in a file on another user s home directory. SNDMSG later became one component of a networked mail program written for the TENEX operating system by Ray Tomlinson in 1971 . The other component was READMAIL . See also Sendmail Reflist DEFAULTSORT Sndmsg Category Message transfer agents Network software stub he SNDMSG ...   more details



  1. SMX

    SMX may refer to As an abbreviation SMX computer language , Server Macro Expansion , a macro language for web pages SMX operating system , a Unix like simulator on SPARC, the SunOS Solaris MINIX http www.minix3.org previous versions CD ROM 2.0 README.TXT http www.csd.uoc.gr hy345 assignments 99b smx howto.html SMX programmable logic controller A franchise of many component level service centers in India for repair of PLC ie. Programmable Logic Controller http smxplc.com SMX Convention Center , besides the Mall of Asia, largest private venue in Philippines Sulfamethoxazole , an antibiotic whose abbreviations include SMX Honda SMX , a mini van also called an SMX Spatial multiplexing , MIMO wireless transmission technique, sometimes abbreviated SMX cf. WiMAX MIMO Spatial Multiplexing Select Mixed Choir , Little Miami High School s elite vocal chorus Search Marketing Expo many articles reference it or its documents because Google makes announcements and conferences there and its SMX Conference , related to Danny Sullivan technologist Singapore Mercantile Exchange , in Singapore, abbreviated SMX SmX RNA , a ribonucleic acid in some species of nematode worms, linked to the SmY RNA S.M.X., director of Revelation at the 1999 New York Underground Film Festival As a code Santa Maria Public Airport , in California, IATA code SMX Alitalia Express , regional airline based in Rome, Italy, ICAO airline code SMX SMTC Corporation , electronics manufacturing services in Canada, TSX Toronto ticker code SMX Sanmenxia , a prefecture level city in Henan, China, governmental code SMX http www.smx.gov.cn Sendmail Sendmail X MeTA1 Sendmail X , now MeTA1, mail server coded smX Special Mobile Machine Exempt, prefix SMX, on vehicle registration plates of Colorado maybe not notable enough yet though looking like the kiwi McAffee , noted in case SMX company , anti spam anti virus company in New Zealand http smx.co.nz Disambig es SMX desambiguaci n ...   more details



  1. Drac

    Drac , from the Latin draco , is the word for dragon or devil in several languages, such as Catalan language Catalan and Romanian language Romanian . Drac or DRAC may also refer to Drac, abbreviation for the orchid genus Dracula orchid Dracula Drac, nickname of the trans Neptunian object mpl 2008 KV 42 Drac enemy mine , alien species in Barry B. Longyear s The Enemy Papers trilogy Drac River , waterway in France, tributary of the Is re Beaucaire, Gard Le Drac Le Drac , dragon like beast that, according to French folklore, terrorised the town of Beaucaire, France DRAC Dynamic Relay Authorization Control , daemon that dynamically updates a relay authorization map for sendmail Dell DRAC Dell Remote Access Controller , remote access card available in many models of Dell servers which allows remote mounting of CD DVD Floppy media, remote reboots, and console KVM access disambig fr Drac homonymie it Drac ...   more details



  1. XMail

    notability Products date October 2008 unreferenced date October 2008 XMail is a free open source, developed by Davide Libenzi , POP3 ESMTP mail server for Unix and Microsoft Windows operating systems. Unlike other email servers, XMail does not require that each user have a system account, instead it uses flat file databases to store user information. XMail is a light weight email server ideally suited for use in situations where other servers such as sendmail and qmail would be overkill. External links http www.xmailserver.org Official site Category Email Category Message transfer agents Category Free email server software unix stub de XMail fr XMail ja XMail ...   more details



  1. Linux Network Administrators' Guide

    The Linux Network Administrator s Guide NAG is a book on setting up and running Unix computer network networks . The first and second editions are freely available in electronic form under the GNU Free Documentation License GFDL . It was originally produced by Olaf Kirch and others as part of the Linux Documentation Project with help from O Reilly Media O Reilly . The second edition, from Terry Dawson , was released March 2000. The third edition of the guide was written by Tony Bautts , with assistance from Gregor N. Purdy in February 2005, but is not freely available like the previous two versions. It includes the following sections Introduction to Computer network Networking Issues of TCP IP Networking Configuring the Networking Hardware Setting up the Serial Hardware Configuring TCP IP Networking Name Service and Resolver Configuration Serial Line IP The Point to Point Protocol Various Network Applications The Network Information System The Network File System protocol Network File System Managing UUCP Electronic Mail Getting email Up and Running sendmail Sendmail IDA Netnews C News A Description of Network News Transfer Protocol NNTP News client Newsreader Configuration A glossary Annotated Bibliography. References FOLDOC External links The Second edition, http www.tldp.org LDP nag2 index.html The Third edition http www.oreilly.com catalog linag3 Linux Category 2005 books Category O Reilly Media books Category Linux books Category Technical communication ...   more details



  1. Httpd.conf

    lowercase httpd.conf is a configuration file which is used by the Apache HTTP Server . It stores information on various functions of the server, which can be edited by removing or adding a number sign at the beginning of the line, thus setting values for each directive. The httpd.conf file can be located on any UNIX UNIX based system that complies with the Filesystem Hierarchy Standard under the following path etc httpd httpd.conf. This file, httpd.conf was once used in Microsoft s Internet Information Services There is a module, invented and originally written in April 1996, called mod rewrite that is designed to provide a rule based Rewrite engine rewriting engine , based on a regular expression parser, to rewrite requested URL s on the fly. This module operates on the full URLs including the path info part both in per server context httpd.conf and per directory context .htaccess and can generate query string parts on result. The rewritten result can lead to internal sub processing, external request redirection or to an internal proxy throughput. It has been described as voodoo, and Brian Behlendorf of the Apache Group has said, The great thing about mod rewrite is it gives you all the configurability and flexibility of Sendmail . The downside to mod rewrite is that it gives you all the configurability and flexibility of Sendmail. ref http httpd.apache.org docs 1.3 mod mod rewrite.html ref Commands The code RewriteRule code , code RewriteCond code and code alias code commands can be used to configure URL s. The latter command is simpler and more reliable. However, it may require root access . References reflist External links http httpd.apache.org docs 2.0 configuring.html Official configuration from Apache project homepage DEFAULTSORT Httpd.Conf Category Configuration files software stub es Httpd.conf ru Httpd.conf ...   more details



  1. Qmail

    transfer agent MTA s have been published. The most popular predecessor to qmail, Sendmail , was not designed ... to sendmail, qmail has a modular architecture composed of mutually untrusting components for instance ... When it was released, qmail was significantly faster than Sendmail, particularly for bulk ... lists. Simplicity Sendmail configuration is complex. For common configurations, qmail is significantly ... response to Sendmail, an extremely popular and somewhat beloved piece of Unix software. Author Bernstein was not shy about pointing out the deficiencies in Sendmail s design and the superior characteristics of qmail, nor did he take pains to replicate Sendmail s behavior, which at the time ... that post date qmail. Standards compliance qmail was not designed to replace Sendmail , and does not behave exactly as Sendmail did in all situations. In some cases, these differences in behavior have ...   more details



  1. Lsof

    lowercase title lsof infobox software name lsof logo file screenshot file caption collapsible author developer Vic Abell released start date YYYY MM DD discontinued latest release version 4.82 latest release date start date 2009 03 25 start date and age YYYY MM DD latest preview version latest preview date start date and age YYYY MM DD frequently updated programming language operating system platform size language status genre license BSD license compatible ref ftp lsof.itap.purdue.edu pub tools unix lsof FAQ lsof FAQ, 1.9 Is there an lsof license? ref website http people.freebsd.org abe lsof is a command meaning l i s t o pen f iles , which is used in many Unix like systems to report a list of all open files and the processes that opened them. This open source utility was developed and supported by Vic Abell, the retired Associate Director of the Purdue University Computing Center. It works in and supports several Unix flavors. ref citation title Unix Network Programming the Sockets networking API author W. Richard Stevens, Bill Fenner, Andrew M. Rudoff year 2003 publisher Addison Wesley Professional url http books.google.com ?id ptSC4LpwGA0C&pg RA1 PA897&lpg RA1 PA897&dq Lsof id ISBN 0131411551 isbn 9780131411555 ref Open files in the system include disk files, pipes , network Internet socket sockets and devices opened by all processes. One use for this command is when a disk cannot be unmounted because unspecified files are in use. The listing of open files can be consulted suitably filtered if necessary to identify the process that is using the files. source lang bash lsof var COMMAND PID USER FD TYPE DEVICE SIZE OFF NODE NAME syslogd 350 root 5w VREG 222,5 0 440818 var adm messages syslogd 350 root 6w VREG 222,5 339098 6248 var log syslog cron 353 root cwd VDIR 222,5 512 254550 var atjobs source To view the port associated with a daemon source lang bash lsof i n P grep sendmail sendmail 31649 root 4u IPv4 521738 TCP 25 LISTEN source From the above we can see th ...   more details



  1. MIMEDefang

    program that communicates with Sendmail and the filtering processes A multiplexor written in C that manages ...   more details



  1. Cloudmark

    25 ref , it also teams with Sendmail ref Cite web url http news.cnet.com Sendmail, Cloudmark team against spam 2100 1032 3 5101065.html title Sendmail, Cloudmark team against spam author Stefanie Olsen ...   more details



  1. List of mail servers

    Scalix Sendmail Smail SmarterMail SparkEngine SMTP proxy SMTP Proxy Sun Java System SurgeMail Synovel ...   more details



  1. ZOSS

    Orphan date February 2009 Unreferenced date August 2009 Notability date August 2009 Zimbabwe Open Software Society ZOSS is a youthful volunteer group that consist of young Zimbabweans resident in the country and abroad. The main objective of the society is to help Zimbabwe take full advantage of Information and Communications Technology ICT through creating a strong awareness of all the software options that are at users disposal. ZOSS focus is on free software free and open source software , simply referred to as open software. Contributions to the society are made on part time and volunteer basis. The society is still in its infancy. ZOSS is inspired by the fact that it has been proven that major established Open Software is more stable, secure and efficient that the commercial equivalent. Open software in this category include Linux , MySQL database, PostgreSQL database, mail server postfix, sendmail, exim , Squid proxy server, Apache webserver which is used by more than 70 of webserver s in the world, and several others. Zimbabwe org stub Africa org stub Category Computer related organizations Category Organisations based in Zimbabwe ...   more details



  1. ZMailer

    ZMailer is a mail transfer agent for Linux , BSD and other Unix like systems. It is intended for gateways or mail servers or other large site environments that have extreme demands on the abilities of the mailer. It was first developed in 1988, in reaction to the then existing problems with Sendmail , by Rayan S. Zachariassen at the University of Toronto . The lead developer, since at least 1994, is Matti E. Aarnio. While official releases have recently been infrequent, regular development and bug fixes occur in Concurrent Versions System CVS . ZMailer supports all the modern features expected in a Mail transfer agent MTA including DNSBL , Sender Policy Framework SPF , and message content scanning. One site of note utilizing ZMailer is vger.kernel.org , hosting the various Linux kernel mailing list s. External links http www.zmailer.org ZMailer homepage http vger.kernel.org vger.kernel.org http www.average.org zmscanner Zmscanner input filter for syncronous SMTP input message scanning with many mechanisms, including ClamAV antivirus. http kocmuk.ru zmscanner en Zmscanner additional modules http wiki.dovecot.org LDA ZMailer Dovecot LDA as local delivery agent for ZMailer network software stub Category Message transfer agents ru Zmailer ...   more details



  1. NetDirector

    NetDirector is an open source and extensible Software framework framework for managing service configurations. NetDirector was placed in the public domain by Emu Software in April 2006 and licensed under a modified version of the Mozilla Public license, the NetDirector Public License. NetDirector provides a Web accessible GUI for the management of the following services HTTP Apache HTTP Server Apache DNS BIND DHCP File and Print Services Samba , Network File System protocol NFS Email Postfix software Postfix , Sendmail FTP VSFTP Users and Groups mass add users to multiple servers at once Network Interfaces Numerous System files LDAP OpenLDAP and Fedora Directory Services Kerberos Beta Red Hat Network interfaces with the RHEL update tool External links http www.netdirector.org NetDirector http www.emusoftware.com Emu Software http www.netdirector.org npl NetDirector Public License References http searchnetworkingchannel.techtarget.com tip 0,289483,sid100 gci1235382,00.html Search Networking Channel article by Maria Winslow Manage servers remotely with open source NetDirector Category System administration ...   more details



  1. Micha? Zalewski

    distinguish Michael Zalewski Micha Zalewski born 19 January 1981 , also known by the user name lcamtuf , is a white hat Hacker computer security hacker , computer security expert from Poland and a Google Inc. employee. He has been a prolific vulnerability researcher and a frequent Bugtraq poster since mid 1990s, and has authored a number of programs for Unix like operating systems . In 2005, Zalewski authored Silence on the Wire A Field Guide to Passive Reconnaissance and Indirect Attacks , a computer security book published by No Starch Press and subsequently translated to a number of languages. For his continued research on browser security, he was named one of the 15 most influential people in security ref cite web title 15 Most Influential People in Security Today url http www.eweek.com c a Security The 15 Most Influential People in Security Today 5 accessdate December 11, 2008 ref and among the 100 most influential people in IT. ref cite web title 100 Most Influential People in IT url http www.eweek.com index2.php?option content&task view&id 47427 accessdate December 11, 2008 ref Zalewski was one the original creators of Argante, a virtual open source operating system . Reported bugs Notable vulnerabilities cite web title CA 2003 25 Buffer Overflow in Sendmail work CERT Advisories url http www.cert.org advisories CA 2003 25.html accessdate August 22, 2005 cite web title CA 2003 12 Buffer Overflow in Sendmail work CERT Advisories url http www.cert.org advisories CA 2003 12.html accessdate August 22, 2005 cite web title CA 2001 09 Statistical Weaknesses in TCP IP Initial Sequence Numbers work CERT Advisories url http www.cert.org advisories CA 2001 09.html accessdate August 22, 2005 cite web title VU 945216 SSH CRC32 ... Contains Remote Integer Overflow work CERT Advisories url http www.kb.cert.org vuls id 945216 accessdate August 22, 2005 This vulnerability made an appearance on The Matrix Reloaded . cite web title VU 965206 Microsoft Internet Explorer ... vuln ...   more details



  1. Trustix

    Unreferenced date March 2008 Infobox OS name Trustix Secure Linux logo screenshot caption website developer Comodo Group family Unix like source model Open source released latest release version 3.0.5 Fact date May 2009 latest release date latest test version latest test date frequently updated marketing target language kernel type ui license working state Discontinued Fact date May 2009 supported platforms updatemodel package manager Trustix Secure Linux was a Linux distribution intended for use on Server computing server s and focused on security and stability. It was a hardened and secure OS, meaning that non essential services and binaries are not installed, while Unix UNIX staples like Sendmail are replaced by programs like Postfix software Postfix . Trustix was originally produced by Trustix AS. The company was established late in 1997 by entrepreneurs from USA and Norway. The company went bankrupt in 2003 and Comodo Group bought the assets in November 2003. Shortly thereafter Comodo announced the end of the free version of Trustix Secure Linux. Not long thereafter Comodo changed their minds and the free version reappeared. By late 2005 a series of budget cuts had resulted in many of the developers being laid off, and by early 2006 all members of the original Trustix team had left the company. Trustix Secure Linux continues to be maintained by a very small team of developers in India. Fact date May 2009 By late 2007 Comodo announced that it will discontinue all distribution, updates and direct support for Trustix Secure Linux effective December 31, 2007. Fact date April 2010 External links Wayback url http www.trustix.org title Trustix Secure Linux date 20071030023559 Linux distributions Category Discontinued Linux distributions Category RPM based Linux distributions Category Gateway routing firewall distribution de Trustix Secure Linux fr Trustix it Trustix Secure Linux no Trustix pl Trustix ro Trustix ...   more details



  1. Qpsmtpd

    lowercase title qpsmtpd Infobox software name qpsmtpd screenshot logo caption developer Ask Bj rn Hansen latest release version 0.84 latest release date release date and age 2010 04 07 operating system Unix genre open source , Mail transfer agent license MIT license website http smtpd.develooper.com qpsmtpd is an Simple Mail Transfer Protocol SMTP Daemon computer software daemon written in Perl . It was originally designed to be a drop in replacement for qmail smtpd , the SMTP component of qmail , and it is now also compatible with Postfix software Postfix , Exim , sendmail and virtually any software that speaks SMTP . With its flexible plugin system it s easy to make it interoperate with other pieces in a mail system. Its main purpose is to allow mail administrators to perform more advanced Spam e mail spam filtering than is possible with other SMTP daemons. As one example of dozens, the http svn.perl.org qpsmtpd trunk plugins check earlytalker check earlytalker module blocks many viruses and mass mailers based on their characteristic violation of basic SMTP protocol , even before they start sending actual mail data. The program s main author is Ask Bj rn Hansen . It is licensed under the MIT License . See also Portal Free software Anti Spam SMTP Proxy a similar project Further reading http www.oreillynet.com pub a sysadmin 2005 09 15 qpsmtpd.html Using qpsmtpd http searchenterpriselinux.techtarget.com tip 0,289483,sid39 gci1235770,00.html TechTarget article on qpsmtpd http www.taint.org 2007 04 17 132339a.html Using qpsmtpd for traps.spamassassin.org External links http smtpd.develooper.com qpsmtpd Develooper LLC http wiki.qpsmtpd.org qpsmtpd wiki http www.ohloh.net p qpsmtpd Ohloh page Freshmeat qpsmtpd qpsmtpd Category Free software programmed in Perl Category Message transfer agents Category Perl software Category Software using the MIT license network software stub ...   more details



  1. COPS (software)

    About the software the governing body Conference of the Parties COP16 COPS was the first common Unix computer system security scanning tool, created by Dan Farmer Gene Spafford helped him start it in 1989 while Dan was in summer school at Purdue University . Features COPS Computer Oracle and Password System integrates around 12 small security check programs which review the security state of the system it is run on. These programs look for from the COPS README.1 file file, directory, and device permissions nodes poor passwords content, format, and security of password and group files programs and files run in etc rc and cron tab files existence of root SUID files, their writability, and whether they are shell scripts a CRC check against important binaries or key files writability of users home directories and startup files anonymous ftp setup unrestricted tftp, decode alias in sendmail, SUID uudecode problems, hidden shells inside inetd.conf, rexd in inetd.conf miscellaneous root checks current directory in the search path, a in the etc host.equiv file, unrestricted NFS mounts, ensuring root is in etc ftpusers checking dates of CERT advisories vs. key files. the Kuang expert system COPS was the forerunner of the Security Administrator Tool for Analyzing Networks SATAN network security scan tool. COPS is generally considered obsolete, but it is not uncommon to find systems which are set up in an insecure manner that COPS will identify. See also Dan Farmer Gene Spafford Security Administrator Tool for Analyzing Networks SATAN External links ftp coast.cs.purdue.edu pub tools unix scanners cops The COPS program http citeseer.ist.psu.edu farmer92cops.html Citeseer entry for the COPS Usenix paper Category Computer security software security software stub ...   more details



  1. POP before SMTP

    POP before SMTP or SMTP after POP is a method of authorization used by mail server software which helps allow users the option to send e mail from any location, as long as they can demonstrably also fetch their mail from the same place. Technically, users are allowed to use SMTP from an IP address as long as they have previously made a successful logging computer security login into the POP3 POP service at the same mail hosting provider, from the same IP address, within a predefined Timeout telecommunication timeout period . The main advantage of this process is that it s generally transparent to the average user who will be connecting with an email client , which will almost always make a connection to fetch new mail before sending new mail. The disadvantages include a potentially complex setup for the mail hosting provider requiring some sort of communication channel between the POP service and the SMTP service and uncertainty as to how much time users will take to connect via SMTP to send mail after connecting to POP. Those users not handled by this method need to resort to other authorization methods. Also, in cases where users come from externally controlled dial up addresses more specifically, all dynamically assigned IP addresses , the SMTP server must be careful about not giving too much leeway when allowing unauthorized connections, because of a possibility of race condition s leaving an open mail relay unintentionally exposed. See also SMTP AUTH specified in RFC 4954 Mail submission agent Protocol Mail submission protocol specified in RFC 4409 External links http popbsmtp.sourceforge.net An open source POP before SMTP implementation for sendmail on Linux Category Email authentication Category Computer access control protocols compu network stub de SMTP After POP ja POP before SMTP ...   more details




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