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mailx is a Unix utility program for sending and receiving mail, also known as a Mail User Agent program. Being a console application with a command syntax similar to ed , it is the POSIX standardized variant [ 1 ] of the Berkeley Mail utility.
Although initially installed at /usr/ucb/Mail, (with the earlier Unix mail still available at /bin/mail), on most modern Unix and Linux systems the commands Mail, mail and/or mailx all invoke a descendant of this Berkeley Mail, which much later was the base for the standardization of a mail program by the OpenGroup, the POSIX standardized ...
User-level email clients typically use SMTP only for sending messages to a mail server for relaying, and typically submit outgoing email to the mail server on port 587 or 465 per RFC 8314. For retrieving messages, IMAP (which replaced the older POP3 ) is standard, but proprietary servers also often implement proprietary protocols, e.g ...
The comparison of mail servers covers mail transfer agents (MTAs), mail delivery agents, and other computer software that provide e-mail services.. Unix-based mail servers are built using a number of components because a Unix-style environment is, by default, a toolbox [1] operating system.
Sendmail is a general purpose internetwork email routing facility that supports many kinds of mail-transfer and delivery methods, including the Simple Mail Transfer Protocol (SMTP) used for email transport over the Internet.
A "Basic Status Code" SMTP reply consists of a three digit number (transmitted as three numeric characters) followed by some text. The number is for use by automata (e.g., email clients) to determine what state to enter next; the text ("Text Part") is for the human user. The first digit denotes whether the response is good, bad, or incomplete:
You can use a third-party email application to send and receive emails, if you'd prefer a different interface. Below are the server settings you'll need to use and links to common email app setup instructions. If you need specific help configuring your app, please contact its manufacturer. Mail server settings
Mutt is a text-based email client for Unix-like systems. It was originally written by Michael Elkins in 1995 and released under the GNU General Public License version 2 or any later version.