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Preliminary note
================
OpenSMTPD is a FREE implementation of the server-side SMTP protocol as defined
by RFC 5321, with some additional standart extensions.
It allows ordinary machines to exchange e-mails with other systems speaking
the SMTP protocol.
OpenSMTPD runs on top of the OpenBSD operating system but also has a portable
version that can build and run on several systems, including:
* Linux
* FreeBSD
* NetBSD
* DragonFly
* MacOSX
For more information: [http://www.opensmtpd.org/portable.html](http://www.opensmtpd.org/portable.html)
People interested about OpenSMTPD are encouraged to subscribe to our mailing
list: [http://www.opensmtpd.org/list.html](http://www.opensmtpd.org/list.html)
and to join the IRC channel: #OpenSMTPD @ irc.freenode.net
Cheers !
How to build, configure and use Portable OpenSMTPD
==================================================
Dependencies
------------
Portable OpenSMTPD relies on:
* [autoconf](http://www.gnu.org/software/autoconf/)
* [automake](http://www.gnu.org/software/automake/)
* [Berkeley DB](http://www.oracle.com/technetwork/products/berkeleydb/overview/index.html)
* [bison](http://www.gnu.org/software/bison/) (or [byacc](http://invisible-island.net/byacc/byacc.html))
* [libevent](http://libevent.org/)
* [libtool](http://www.gnu.org/software/libtool/)
* [openssl](http://www.openssl.org/)
Get the source
--------------
git clone -b portable git://github.com/poolpOrg/OpenSMTPD.git opensmtpd
or
wget http://www.opensmtpd.org/archives/opensmtpd-portable-latest.tar.gz
tar xzvf opensmtpd-portable-latest.tar.gz
Build
-----
cd opensmtpd*
./bootstrap
./configure
make
sudo make install
### Special notes for FreeBSD/DragonFlyBSD/Mac OS X:
Please launch configure with special directive about libevent directory:
#### FreeBSD:
./configure --with-libevent-dir=/usr/local
#### DragonFlyBSD:
./configure --with-libevent-dir=/usr/pkg
#### Mac OS X:
./configure --with-libevent-dir=/opt/local
make CFLAGS="-DBIND_8_COMPAT=1"
Install
-------
sudo make install
Configure /etc/smtpd.conf
-------------------------
Please have a look at the complete format description of [smtpd.conf configuration file](http://opensmtpd.org/smtpd.conf.5.html)
Add OpenSMTPD users
-------------------
To operate, OpenSMTPD requires at least one user, by default _smtpd; and
preferably three users, by default _smtpd, _smtpq and _smtpf.
The instructions below assume the default users however, the configure
script allows overriding these using the options:
--with-privsep-user, --with-queue-user and --with-filter-user.
### NetBSD, Linux (Debian, ArchLinux, ...)
mkdir /var/empty
useradd -c "SMTP Daemon" -d /var/empty -s /sbin/nologin _smtpd
useradd -c "SMTP queue user" -d /var/empty -s /sbin/nologin _smtpq
useradd -c "SMTP filter user" -d /var/empty -s /sbin/nologin _smtpf
### DragonFlyBSD, FreeBSD
pw useradd _smtpd -c "SMTP Daemon" -d /var/empty -s /sbin/nologin
pw useradd _smtpq -c "SMTP queue user" -d /var/empty -s /sbin/nologin
pw useradd _smtpf -c "SMTP filter user" -d /var/empty -s /sbin/nologin
### Mac OS X
First we need a group with an unused GID below 500, list the current ones used:
/usr/bin/dscl . -list /Groups PrimaryGroupID | sort -n -k2,2
Add a group - here we have picked 444:
/usr/bin/sudo /usr/bin/dscl . -create /Groups/_smtpd PrimaryGroupID 444
Then the user. Again we need an unused UID below 500, list the current ones used:
/usr/bin/dscl . -list /Users UniqueID | sort -n -k2,2
Add a user - here we have picked 444:
/usr/bin/sudo /usr/bin/dscl . -create /Users/_smtpd UniqueID 444
/usr/bin/sudo /usr/bin/dscl . -delete /Users/_smtpd AuthenticationAuthority
/usr/bin/sudo /usr/bin/dscl . -delete /Users/_smtpd PasswordPolicyOptions
/usr/bin/sudo /usr/bin/dscl . -delete /Users/_smtpd dsAttrTypeNative:KerberosKeys
/usr/bin/sudo /usr/bin/dscl . -delete /Users/_smtpd dsAttrTypeNative:ShadowHashData
/usr/bin/sudo /usr/bin/dscl . -create /Users/_smtpd RealName "SMTP Daemon"
/usr/bin/sudo /usr/bin/dscl . -create /Users/_stmpd Password "*"
/usr/bin/sudo /usr/bin/dscl . -create /Users/_smtpd PrimaryGroupID 444
/usr/bin/sudo /usr/bin/dscl . -create /Users/_smtpd NFSHomeDirectory /var/empty
/usr/bin/sudo /usr/bin/dscl . -create /Users/_smtpd UserShell /usr/bin/false
repeat for the _smtpq and _smtpf users.
Launch smtpd
------------
First, kill any running sendmail/exim/qmail/postfix or other.
Then:
smtpd &
or in debug and verbose mode
smtpd -dv
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