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Fetchmail
Fetchmail is an open-source software utility for POSIX-compliant operating systems which is used to retrieve e-mail from a remote POP3, IMAP, or ODMR mail server to the user's local system. It was developed from thpopclientprogram, written by Carl Harris. Its chief significance is perhaps that its author, Eric S. Raymond, used it as a model to discuss his theories of open-source software development in a widely read and influential essay on software development methodologies ''The Cathedral and the Bazaar''. Design By design, Fetchmail's only means of delivering messages is by submitting them to the local MTA/Message transfer agent or invoking a mail delivery agent like procmail, maildrop, or sendmail; delivering directly to mail folders such as maildir is not supported. It is a C program evolved by gradual mutation from an ancestor already written in C. Dan Bernstein, getmail creator Charles Cazabon and FreeBSD developer Terry Lambert, have criticized Fetchmail's design, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Getmail
getmail is a simple mail retrieval agent intended as a replacement for fetchmail, implemented in Python. It can retrieve mail from POP3, IMAP4, and ''Standard Dial-up POP3 Service'' servers, with or without SSL. It supports simple and domain (multidrop) mailboxes, mail filtering via any arbitrary program, and supports a wide variety of mail destination types, including mboxrd, maildir, and external arbitrary mail delivery agents. Unlike fetchmail, getmail's Python foundation makes it nearly immune to buffer overflow security holes. It also has a simpler configuration syntax than fetchmail, but supports fewer authentication protocols. The software can also function as a basic mail delivery agent. Getmail is free software and is licensed under the GNU General Public License version 2. It is written and maintained by Charles Cazabon. The original getmail software requires Python 2, which is no longer supported. A fork named getmail6, which is not from getmail's original autho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mail Delivery Agent
A message delivery agent (MDA), or mail delivery agent, is a computer software component that is responsible for the delivery of e-mail messages to a local recipient's mailbox. It is also called a local delivery agent (LDA). Within the Internet mail architecture, local message delivery is achieved through a process of handling messages from the message transfer agent, and storing mail into the recipient's environment (typically a mailbox). Spam filtering usually occurs at the MDA under modern email architectures. Implementation Many mail handling software products bundle multiple message delivery agents with the message transfer agent component, providing for site customization of the specifics of mail delivery to a user. Unix On Unix-like systems, procmail and maildrop are the most popular MDAs. The Local Mail Transfer Protocol (LMTP) is a protocol that is frequently implemented by network-aware MDAs. Invocation The mail delivery agent is generally not started f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fdm (software)
fdm (fetch/filter and deliver mail) is a mail delivery agent and email filtering software for Unix-like operating systems, similar to fetchmail and procmail. It was started in 2006 by Nicholas Marriott who later also started tmux in 2007. Adoption fdm is available as a package in many Unix-like operating systems. It has been included in OpenBSD ports since 2007-01-18. In 2014, the last maintainer of procmail posted a message to an OpenBSD mailing list himself suggesting that he removed the procmail port, it had been suggested by a well-known OpenBSD ports maintainer that fdm is the natural alternative (the procmail port, however, had not been removed and remained in place as of 2020). fdm is listed on the OpenBSD Innovations page, in the section of projects maintained by OpenBSD developers outside of OpenBSD. See also * fetchmail * procmail * maildrop * Sieve (mail filtering language) Sieve is a programming language that can be used for email filtering. It owes its ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mail Retrieval Agent
A mail retrieval agent (MRA) is a computer application that retrieves or fetches e-mail from a remote mail server and works with a mail delivery agent to deliver mail to a local or remote email mailbox. MRA is an automated agent that works on behalf of the user agent checks for the new incoming mail. MRAs may be external applications by themselves or be built into bigger applications like a mail user agent. Significant examples of standalone MRAs include fetchmail and getmail. The concept of an MRA is not standardized in email architecture. Although they operate like mail transfer agents, MRAs are technically clients when they retrieve and submit messages. Delivery mechanisms The mail retrieval agent may support delivery of retrieved mail via the following mechanisms: * Via a mail transport agent (Listening for SMTP transfers on port 25) * Via a mail delivery agent * Direct delivery to an mbox formatted mailbox * Direct delivery to a maildir directory * Output to standard outpu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Procmail
procmail is an email server software component — specifically, a message delivery agent (MDA). It was one of the earliest mail filter programs. It is typically used in Unix-like mail systems, using the mbox and Maildir storage formats. procmail was first developed in 1990, by Stephen R. van den Berg. Philip Guenther took over maintainership for a number of years, but relinquished the role in 2014. The software remained unmaintained for several years, and was believed to be defunct. In 2020 May, Stephen van den Berg resumed maintenance again. The program has since seen multiple releases and bug-fixes. Uses The most common use case for procmail is to filter mail into different mailboxes, based on criteria such as sender address, subject keywords, and/or mailing list address. Another use is to let procmail call an external spam filter program, such as SpamAssassin. This method can allow for spam to be filtered or deleted. The procmail developers have built a maili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
OfflineIMAP
OfflineIMAP is IMAP synchronization utility software, capable of synchronizing mail on IMAP server with local Maildir folder or another server. Description The synchronization is performed bidirectionally between two endpoints ("Remote" and "Local" repositories). OfflineIMAP accesses mail servers only via Internet Message Access Protocol. (It does not support Post Office Protocol, another popular way to get mail from a server.) It works faster (though it is sensitive to connection's latency) and supports more advanced features than most mail clients. A special mode for better handling the non-standard implementation of IMAP in Gmail may optionally be enabled in a configuration file. When configured to store mail locally, OfflineIMAP uses the Maildir format. Unix mail boxes support may be added in the future, though currently it is not implemented. Configuration Several synchronization accounts, each consisting of Remote and Local repositories, may be defined in configurati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Cathedral And The Bazaar
''The Cathedral and the Bazaar: Musings on Linux and Open Source by an Accidental Revolutionary'' (abbreviated ''CatB'') is an essay, and later a book, by Eric S. Raymond on software engineering methods, based on his observations of the Linux kernel development process and his experiences managing an open source project, fetchmail. It examines the struggle between top-down and bottom-up design. The essay was first presented by Raymond at the Linux Kongress on May 27, 1997, in Würzburg, Germany, and was published as the second chapter of the sametitled book in 1999. The illustration on the cover of the book is a 1913 painting by Lyubov Popova titled ''Composition with Figures'' and belongs to the collection of the State Tretyakov Gallery. The book was released under the Open Publication License v2.0 in 1999. Central thesis The software essay contrasts two different free software development models: * The ''cathedral'' model, in which source code is available with each ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
FreeBSD
FreeBSD is a free-software Unix-like operating system descended from the Berkeley Software Distribution (BSD). The first version was released in 1993 developed from 386BSD, one of the first fully functional and free Unix clones on affordable home-class hardware, and has since continuously been the most commonly used BSD-derived operating system. FreeBSD maintains a complete system, delivering a kernel, device drivers, userland utilities, and documentation, as opposed to Linux only delivering a kernel and drivers, and relying on third-parties such as GNU for system software. The FreeBSD source code is generally released under a permissive BSD license, as opposed to the copyleft GPL used by Linux. The project includes a security team overseeing all software shipped in the base distribution. Third-party applications may be installed using the pkg package management system or from source via FreeBSD Ports. The project is supported and promoted by the FreeBSD Foundation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dan Bernstein
Daniel Julius Bernstein (born October 29, 1971) is an American mathematician, cryptologist, and computer scientist. He was a professor of Computer Science at the University of Illinois at Chicago from 1995 to 2008. He was a visiting professor in the department of mathematics and computer science at the Eindhoven University of Technology, and a visiting professor at CASA at Ruhr University Bochum through 2023. Early life Bernstein attended Bellport High School, a public high school on Long Island, graduating in 1987 at the age of 15. The same year, he ranked fifth in the Westinghouse Science Talent Search. In 1987, he achieved a Top 10 ranking in the William Lowell Putnam Mathematical Competition, and was a member of the second-place team from Princeton University the following year. Bernstein earned a B.A. in mathematics from New York University (1991) and a Ph.D. in mathematics from the University of California, Berkeley (1995), where he studied under Hendrik Lenstra. ''Berns ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
C (programming Language)
C (''pronounced'' '' – like the letter c'') is a general-purpose programming language. It was created in the 1970s by Dennis Ritchie and remains very widely used and influential. By design, C's features cleanly reflect the capabilities of the targeted Central processing unit, CPUs. It has found lasting use in operating systems code (especially in Kernel (operating system), kernels), device drivers, and protocol stacks, but its use in application software has been decreasing. C is commonly used on computer architectures that range from the largest supercomputers to the smallest microcontrollers and embedded systems. A successor to the programming language B (programming language), B, C was originally developed at Bell Labs by Ritchie between 1972 and 1973 to construct utilities running on Unix. It was applied to re-implementing the kernel of the Unix operating system. During the 1980s, C gradually gained popularity. It has become one of the most widely used programming langu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maildir
The Maildir e-mail format is a common way of storing email messages on a file system, rather than in a database. Each message is assigned a Computer file, file with a unique name, and each mail folder is a file system directory containing these files. Maildir was designed by Daniel J. Bernstein circa 1995, with a major goal of eliminating the need for program code to handle file locking and unlocking through use of the local filesystem. Maildir design reflects the fact that the only operations valid for an email message is that it be created, deleted or have its status changed in some way. __TOC__ Specifications A Maildir directory (file systems), directory (often named Maildir) usually has three subdirectories named tmp, new, and cur. * The tmp subdirectory temporarily stores e-mail messages that are in the process of being delivered. This subdirectory may also store other kinds of temporary files. * The new subdirectory stores messages that have been delivered, but have no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
