Running a Mail ServerElectronic mail hardly requires introduction. (Web hosting uk)
Running a Mail ServerElectronic mail hardly requires introduction. Communica- tions made through the original forms of e-mail helpedshape the Internet. Widespread availability of access to e-mailand modern enhancements such as MIME (MultipurposeInternet Mail Extensions, which allow for inclusion of attach- ments and alternate message formats) have helped to makee-mail the most popular application on the Internet. With a Linux system and a suitable Internet connection, youcan easily set up your own mail server for personal or businessuse. This chapter presents two mail-system configurations, compares their features so that you can select the one that bestsuits your needs, and then guides you through the installationprocesses. In the final section, you learn how to secure network commu- nications between clients and a Postfix-based server throughthe use of SSL/TLS (Secure Sockets Layer and Transport LayerSecurity protocols). The examples in this chapter are based on a Debian GNU/Linuxsystem. (See Chapter 9 for more information about Debian.) However, much of the knowledge you gain from setting up amail server in Debian (such as the way you would configure asendmail.mcfile) applies to other Linux systems as well. Internet E-Mail s Inner WorkingsE-mail messages are generated either by an automated process, such as a form processor on a Web page or an automated noti- fication system, or by an MUA (Mail User Agent) controlled byan end user. Messages are delivered through one of two meth- ods to the software performing the MTA (Mail Transfer Agent) function on a server: 2424CHAPTER …In This ChapterUnderstandingInternet e-mailConfiguring yourmail serverRunning sendmailRunning PostfixTesting your mailserverConfiguring mailclientsSecuringcommunications …
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