Meta1

Jul 20, 2023

Secure and efficient mail gateway

MeTA1 is a message transfer agent that has been designed with these main topics in minds

  • Security
  • Reliability
  • Efficiency
  • Configurability
  • Extendibility

MeTA1 consists of five main modules of which only one runs as root

  • mcp the main control program is similar to inetd8 it starts all other MeTA1 modules and watches over their execution. mcp runs as root in order to bind to port 25 and to change the uid of the processes it starts.
  • smtps the SMTP server receives e-mails.
  • smtpc the SMTP client sends e-mails.
  • smar the address resolver provides lookups in various maps including DNS for mail routing.
  • qmgr the queue manager controls the flow of e-mails through the SMTP servers and clients.


Checkout these related ports:
  • Xpbiff -
  • Xmailwatcher - Mailbox checker which displays sender and subject lines of mails
  • Xmailbox - Mailbox checker with sound and animation for X Window System
  • Xmail - X-based interface to the Berkeley mail program
  • Xfce4-mailwatch-plugin - Mail notification applet for the Xfce panel
  • Xfaces - Display shaped icons for mail spool contents
  • Xcite - Exciting Cite for any Mail/News reading modes on Emacs
  • Xbuffy - Replacement for xbiff that handles multiple mail files
  • X-face-e21 - X-Face utilities for Emacs
  • Wmmaiload - Incoming mail monitor dockapp with a similar look to wmcpuload
  • Wmbiff -
  • Whoson - Implementation of `WHO iS ONline' protocol
  • Websieve - Web based Cyrus IMAP user admin client
  • Wanderlust - Mail and news system for Emacs
  • Vrfy - Verify mail address