This document explains what you, as a user, will notice when the systemswitches from sendmail to qmail.This is a global document, part of the qmail package, not reflecting thedecisions made by your system administrator. For details on   * which local delivery agent qmail is configured to use,   * whether qmail is configured to use dot-forward,   * whether ezmlm is installed,   * whether fastforward is installed, and   * all other local configuration features,see your local sendmail-qmail upgrade announcement (which your systemadministrator may have placed into /var/qmail/doc/ANNOUNCE).--- Mailbox locationIf your system administrator has configured qmail to use binmail forlocal deliveries, your mailbox will be in /var/spool/mail/you, just asit was under sendmail.If your system administrator has configured qmail to use qmail-local forlocal deliveries, your mailbox will be moved to ~you/Mailbox. There is asymbolic link from /var/spool/mail/you to ~you/Mailbox, so your mailreader will find the mailbox at its new location.--- Loop controlqmail-local automatically adds a Delivered-To field at the top of everydelivered message. It uses Delivered-To to prevent mail forwardingloops, including cross-host mailing-list loops.--- Outgoing messagesqmail lets you use environment variables to control the appearance ofyour outgoing mail, supplementing the features offered by your MUA. Forexample, qmail-inject will set up Mail-Followup-To for you automaticallyif you tell it which mailing lists you are subscribed to. Seeqmail-inject(8) for a complete list of features.If you're at (say) sun.ee.movie.edu, qmail lets you type joe@mac forjoe@mac.ee.movie.edu, and joe@mac+ for joe@mac.movie.edu without the ee.sendmail has a different interpretation of hostnames without dots.--- Forwarding and mailing listsqmail gives you the power to set up your own mailing lists withoutpestering your system administrator.Under qmail, you are in charge of all addresses of the formyou-anything. The delivery of you-anything is controlled by~you/.qmail-anything, a file in your home directory.For example, if you want to set up a bug-of-the-month-club mailing list,you can put a list of addresses into ~you/.qmail-botmc. Any mail toyou-botmc will be forwarded to all of those addresses. Mail directly toyou is controlled by ~you/.qmail. You can even set up a catch-all,~you/.qmail-default, to handle unknown you- addresses.See dot-qmail(5) for the complete story. Beware that the syntax of.qmail is different from the syntax of sendmail's .forward file.If your system administrator has configured qmail to use the dot-forwardcompatibility tool, you can put forwarding addresses (and programs) into.forward the same way you did with sendmail.If your system administrator has installed ezmlm, you can use ezmlm-maketo instantly set up a professional-quality mailing list, handlingsubscriptions and archives automatically.If your system administrator has installed fastforward, you can easilymanage a large database of forwarding addresses.