This is qpsmtpd, a flexible SMTP daemon written in Perl.

For source code and project details, see http://smtpd.develooper.com/

For help with qpsmtpd itself, see the qpsmtpd mailing list at
http://smtpd.develooper.com/list.html (archives are available, check there
first).

If you skipped the qpsmtpd configuration step when installing the package for
the first time, and need to repeat it, run 'dpkg-reconfigure qpsmtpd'.


A few notes on Debian's packaging of qpsmtpd:

1. Startup

Qpsmtpd does not start up automatically by default.  It is intended to fit
alongside a preexisting MTA, such as Exim, Qmail or Postfix, or to proxy for a
remote SMTP server.  As most Debian systems installed out-of-the-box include an
MTA listening on all interfaces on the usual port (TCP port 25), qpsmtpd cannot
generally start up until this is remedied.


2. Configuration

If you're new to qpsmtpd, start by reading through the configuration files in
/etc/qpsmtpd/.  Much of qpsmtpd's functionality, including fairly basic things
like mail delivery, is handled by plugins, so pay particular attention to
/etc/qpsmtpd/plugins.  You might also find the mailing list archives at
http://smtpd.develooper.com/list.html helpful.

3. Delivery into a Local MTA

3.a. Exim

If you haven't done any particular configuration of your mail system yet, you
probably have Exim installed as your local MTA.  The install scripts will
detect this and attempt to configure things properly, but cannot reconfigure
exim itself.  To allow qpsmtpd to spool into Exim without having the sender
addresses munged, you should edit your Exim configuration to add the 'qpsmtpd'
user to the trusted_users list.  For example:

	in /etc/exim4/exim4.conf.template:

	# uucp should be able to set envelope-from to arbitrary values
	trusted_users = uucp : smtpd

	or, if you use the directory tree config style, in
	/etc/exim4/conf.d/main/02_exim4-config_options:

	# trusted users can set envelope-from to arbitrary values
	.ifndef MAIN_TRUSTED_USERS
	MAIN_TRUSTED_USERS = uucp : smtpd
	.endif



3.b. Postfix

If you select the postfix delivery method via debconf when installing or
reconfiguring qpsmtpd, the install scripts will try to add qpsmtpd to the
'postdrop' group, so as to be able to open the Postfix local delivery socket
(/var/spool/postfix/public/cleanup on a Debian system).  While in a typical
Debian install the postfix socket is itself world-accessible, it is in a
directory accessible only to the postdrop group.

If you manually configure qpsmtpd to spool into Postfix, instead of using
debconf, you will need to make this adjustment manually, by running:

	useradd qpsmtpd postdrop

Although this is the fastest-performing option and is as secure as qpsmtpd
itself, if you don't wish to give qpsmtpd membership in the postdrop group you
can alternately configure Postfix to listen on a loopback TCP socket and use
the SMTP proxy delivery method instead.


4. forkserver vs tcpserver

The standard 'qpsmtpd' startup script is not installed, as it depends upon Dan
Bernstein's non-free tcpserver.  Instead the package uses qpsmtpd-forkserver,
which manages the TCP socket itself at a modest gain in performance.  If you
for some reason need the tcpserver binary, see the source to this package or
download it from the URL above.