Exim The Mail Transfer Agent

Exim delivers electronic mail, both local and remote. It's the default mail transport agent installed on some Linux systems; it runs on many versions of Unix and is suitable for any TCP/IP network with any combination of hosts and end-user mail software. Exim is growing in popularity because it's open source, scalable, and rich in features. These include compatibility with sendmail options, database lookups, support for regular expressions and many kinds of address parsing, sophisticated error handling, and parameters for improving performance. Best of all, Exim is easy to configure. You never have to deal with ruleset 3 or worry that a misplaced asterisk will cause an inadvertent mail bomb. Philip Hazel, the creator of Exim, is the author of this official guide, designed for access to quick information when you're in a hurry as well as thorough coverage of more advanced material.

Exim delivers electronic mail, both local and remote. It has all the virtues of a good postman: it's easy to talk to, reliable, efficient, and eager to accommodate even the most complex special requests. It's the default mail transport agent installed on some Linux systems, runs on many versions of Unix, and is suitable for any TCP/IP network with any combination of hosts and end-user mail software.Exim is growing in popularity because it is open source, scalable, and rich in features such as the following: Compatibility with the calling interfaces and options of Sendmail (for which Exim is usually a drop-in replacement) Lookups in LDAP servers, MySQL and PostgreSQL databases, and NIS or NIS+ services Support for many kinds of address parsing, including regular expressions that are compatible with Perl 5 Sophisticated error handling Innumerable tuning parameters for improving performance and handling enormous volumes of mail Best of all, Exim is easy to configure. You never have to deal with ruleset 3 or worry that a misplaced asterisk will cause an inadvertent mail bomb.While a basic configuration is easy to read and can be created quickly, Exim's syntax and behavior do get more subtle as you enter complicated areas like virtual hosting, filtering, and automatic replies. This book is a comprehensive survey that provides quick information for people in a hurry as well as thorough coverage of more advanced material.

This volume continues the tradition established in 2001 of publishing the c- tributions presented at the Cryptographers’ Track (CT-RSA) of the yearly RSA Security Conference in Springer-Verlag’s Lecture Notes in Computer Science series. With 14 parallel tracks and many thousands of participants, the RSA - curity Conference is the largest e-security and cryptography conference. In this setting, the Cryptographers’ Track presents the latest scienti?c developments. The program committee considered 49 papers and selected 20 for presen- tion. One paper was withdrawn by the authors. The program also included two invited talks by Ron Rivest (“Micropayments Revisited” – joint work with Silvio Micali) and by Victor Shoup (“The Bumpy Road from Cryptographic Theory to Practice”). Each paper was reviewed by at least three program committee members; paperswrittenbyprogramcommitteemembersreceivedsixreviews.Theauthors of accepted papers made a substantial e?ort to take into account the comments intheversionsubmittedtotheseproceedings.Inalimitednumberofcases,these revisions were checked by members of the program committee. I would like to thank the 20 members of the program committee who helped to maintain the rigorous scienti?c standards to which the Cryptographers’ Track aims to adhere. They wrote thoughtful reviews and contributed to long disc- sions; more than 400 Kbyte of comments were accumulated. Many of them - tended the program committee meeting, while they could have been enjoying the sunny beaches of Santa Barbara.

This book is designed as an Ubuntu 21.04 Server administration and reference source, covering the Ubuntu servers and their support applications. Server tools are covered as well as the underlying configuration files and system implementations. The emphasis is on what administrators will need to know to perform key server support and management tasks. Coverage of the systemd service management system is integrated into the book. Topics covered include software management, systemd service management, AppArmor security, OpenSSH, the Chrony time server, and Ubuntu cloud services. Key servers are examined, including Web, FTP, CUPS printing, NFS, and Samba Windows shares. Network support servers and applications covered include the Squid proxy server, the Domain Name System (BIND) server, DHCP, distributed network file systems, IPtables firewalls, and cloud computing.

qmail has quietly become one of the most widely used applications on the Internet today. It's powerful enough to handle mail for systems with millions of users--Like Yahoo! Mail and Hotmail, while remaining compact and manageable enough for the smallest Unix- and Linux-based PC systems. Its component design makes it easy to extend and customize while keeping its key functions secure, so it's no wonder that adoption of qmail continues at a rapid pace.The downside? Apparently none. Except that qmail's unique design can be disorienting to those familiar with other popular MTAs (Mail Transfer Agents). If you're coming from sendmail, for instance, you might have trouble recasting your problems and solutions in qmail terms. qmail first helps you establish a "qmail frame of mind," then explores the installation, configuration, administration, and extension of this powerful MTA. Whether you're installing from scratch or managing mailing lists with thousands of users, qmail provides detailed information about how to make qmail do precisely what you wantqmail concentrates on common tasks like moving a sendmail setup to qmail, or setting up a "POP toaster," a system that provides mail service to a large number of users on other computers sending and retrieving mail remotely. The book also fills crucial gaps in existing documentation, detailing exactly what the core qmail software does.Topics covered include: Installation and configuration, including patching qmail Moving from sendmail to qmail Handling locally and remotely originated messages Managing virtual domains Logging qmail activity Tuning qmail performance Running multiple copies of qmail on the same computer Mailing list setup and management Integrating the qmail MTA with POP and IMAP delivery Filtering out spam and viruses If you need to manage mailing lists, large volumes of mail, or simply find sendmail and other MTAs too complicated, qmail may be exactly what's called for. Our new guide, qmail, will provide the guidance you need to build an email infrastructure that performs well, makes sense, and is easy to maintain.

A guide to the Debian 2.1 distribution of Linux demonstrates the capabilities of the completely open-source operating system, covering installation, setup, and basic applications