Notes

Below you will find the necessary steps to compile DBMail-3.0.1 from source for use with a PostgreSQL database and support for SIEVE. These steps work on OpenBSD 5.0 AMD64.

Prepare an OpenBSD installation with the compiler set installed.
Install the required packages:

pkg_add -i postgresql-server glib2 gmime mhash libeventextra gmake

Download libSieve and extract. (Tested with 2.2.7.)

tar xzvf libsieve-2.2.7.tar.gz

Compile libsieve:

cd libsieve-2.2.7/src
./configure 
make

Execute a make install and redirect the output to installresult to be able to find out where the libsieve files are placed:

make install > installresult

Place the following files in a .tar.gz archive, based on a make install output from a libsieve 2.2.7 compilation.

tar vcf libsieve-2.2.7-openbsd-5.0-amd64.tar /usr/local/lib/libsieve*
tar vuf libsieve-2.2.7-openbsd-5.0-amd64.tar /usr/local/lib/pkgconfig/libsieve.pc
tar vuf libsieve-2.2.7-openbsd-5.0-amd64.tar /usr/local/include/sieve2*.h
gzip libsieve-2.2.7-openbsd-5.0-amd64.tar

The archive can be extracted on the server with:

tar xzvpf libsieve-2.2.7-openbsd-5.0-amd64.tar.gz -C /

Download libzdb and extract. (Tested with 2.10.)

tar xzvf libzdb-2.10.tar.gz

Compile libzdb without support for mysql, sqlite and with the recommended protect non-API objects:

cd libzdb-2.10
./configure --without-mysql --without-sqlite --enable-protected
gmake

Execute a make install and redirect the output to installresult to be able to find out where the libzdb files are placed:

gmake install > installresult

Place the following files in a .tar.gz archive, based on a make install output from a libzdb 2.10 compilation.

tar vcf libzdb-2.10-openbsd-5.0-amd64-bin.tar /usr/local/lib/libzdb*
tar vuf libzdb-2.10-openbsd-5.0-amd64-bin.tar /usr/local/include/zdb
gzip libzdb-2.10-openbsd-5.0-amd64-bin.tar

The archive can be extracted on the server with:

tar xzvpf libzdb-2.10-openbsd-5.0-amd64-bin.tar.gz -C /

Download the DBMail source .tar.gz and extract.

tar xzvf dbmail-3.0.1.tar.gz

Change directory to the dbmail-3.0.1 directory:

# cd dbmail-3.0.1

Before you can compile DBMail 3.0.1 on OpenBSD 5.0 you have to apply three small patches:
server.c.patch:

--- src/server.c.original	Tue Feb 28 15:40:28 2012
+++ src/server.c	Fri Mar  2 19:54:19 2012
@@ -474,7 +474,7 @@
                 int serr=errno;
                 switch(serr) {
                         case ECONNABORTED:
-                        case EPROTO:
+                        case EPROTONOSUPPORT:
                         case EINTR:
                                 TRACE(TRACE_DEBUG, "%s", strerror(serr));
                                 break;

dbmail.h.in.patch:

--- src/dbmail.h.in.orig	Sun Aug 14 10:09:59 2011
+++ src/dbmail.h.in	Mon Oct 17 19:23:51 2011
@@ -23,6 +23,8 @@
  * header file for a general configuration
  */
 
+#include <sys/types.h>
+
 #ifndef _DBMAIL_H
 #define _DBMAIL_H
 
@@ -32,7 +34,7 @@
 
 #define __EXTENSIONS__ /* solaris */
 
-#if defined(__FreeBSD__) || defined(__APPLE__) || defined(__SUNPRO_C)
+#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__APPLE__) || defined(__SUNPRO_C)
 
 #define _XOPEN_SOURCE
 
@@ -66,7 +68,6 @@
 #include <string.h>
 #include <strings.h>
 #include <sysexits.h>
-#include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/mman.h>
 #include <sys/socket.h>

configure.patch:

--- configure.original	Tue Feb 28 15:40:28 2012
+++ configure	Fri Mar  2 19:47:52 2012
@@ -4925,7 +4925,7 @@
   cat >>confdefs.h <<_ACEOF
 #define HAVE_EVENT_H 1
 _ACEOF
- EVENTLIB="-levent"
+ EVENTLIB="-levent -leventextra"
 else
   EVENTLIB="failed"
 fi

Copy the above lines to each .patch file, or just download dbmail-3.0.1-openbsd-patches.tar.gz and extract (in the parent directory of the dbmail-3.0.1 directory) with:

tar xzvf dbmail-3.0.1-openbsd-patches.tar.gz

To apply the patches, make sure your working directory is dbmail-3.0.1 and the patches have been extracted to the parent directory of the dbmail-3.0.1 directory and apply with:

patch -p0 < ../dbmail.h.in.patch
patch -p0 < ../server.c.patch
patch -p0 < ../configure.patch

Compile dbmail with libsieve and libzdb:

./configure --with-sieve=/usr/local --with-zdb=/usr/local CPPFLAGS=-I/usr/local/include
make

Execute a make install and redirect the output to installresult to be able to find out where the dbmail files are placed:

make install > installresult

Place the following files in a .tar.gz archive, based on a make install output from a dbmail 3.0.1 compilation.

tar vcf dbmail-3.0.1-openbsd-5.0-adm64.tar /usr/local/lib/dbmail
tar vuf dbmail-3.0.1-openbsd-5.0-adm64.tar /usr/local/sbin/dbmail-*
cp dbmail.conf /etc/dbmail.conf.sample
tar vuf dbmail-3.0.1-openbsd-5.0-adm64.tar /etc/dbmail.conf.sample
gzip dbmail-3.0.1-openbsd-5.0-adm64.tar

Don't forget the line to copy the dbmail.conf to /etc/dbmail.conf.sample!

The archive can be extracted on the server with:

tar xzvpf dbmail-3.0.1-openbsd-5.0-adm64.tar.gz -C /

DBMail “fast and scalable sql based mail services”. At this moment an OpenBSD package isn't available for DBMail.
See also:Helgrim.com - DBMail installation guide and DBMail on OpenBSD for an openbsd-misc mailinglist post from 2005 about DBMail.

Below you will find the necessary steps to compile DBMail2 from source for use with a PostgreSQL database. These steps work on OpenBSD 4.9 and lower.

Prepare an OpenBSD installation with the compiler set installed.
Install the following packages:
For pg_control:

pkg_add -i postgresql-server

For dbmail dependancies:

pkg_add -i glib2
pkg_add -i gmime

To prevent the error message when compiling dbmail:

ln -s /usr/local/include/iconv.h /usr/include/iconv.h   

Extract dbmail:

tar xvzf dbmail-2.2.13.tar.gz

Compile dbmail:

cd ./dbmail-2.2.13
./configure --with-pgsql
make

Execute a make install and redirect the output to makeinstall to be able to find out where the dbmail files are placed:

make install > makeinstall

After this dbmail.conf isn't in the right spot yet, correct this with the following:

cp dbmail.conf /etc/dbmail.conf.sample

After installation dbmail.conf.sample should be renamed to dbmail.conf if /etc/dbmail.conf doesn't exist yet.

Place the following files in a .tar.gz archive, based on a make install output from a dbmail 2.2.13 compilation.

tar vcf /root/dbmail-2.2.13-bin.tar /usr/local/lib/dbmail
tar vuf /root/dbmail-2.2.13-bin.tar /usr/local/sbin/dbmail*
tar vuf /root/dbmail-2.2.13-bin.tar /usr/local/share/man
tar vuf /root/dbmail-2.2.13-bin.tar /etc/dbmail.conf.sample
gzip /root/dbmail-2.2.13-bin.tar

The archive can be extracted on the server with:

tar xvzpf dbmail-2.2.13-bin.tar.gz -C /

Create the user dbmail:

$ createuser -U postgres dbmail
Shall the new role be a superuser? (y/n) n
Shall the new role be allowed to create databases? (y/n) y
Shall the new role be allowed to create more new roles? (y/n) n
Password:
CREATE ROLE

Set a password for the user dbmail:

$ psql -U postgres
Password for user postgres:
Welcome to psql 8.2.6, the PostgreSQL interactive terminal.

Type:  \copyright for distribution terms
       \h for help with SQL commands
       \? for help with psql commands
       \g or terminate with semicolon to execute query
       \q to quit

postgres=# alter user dbmail with password 'password';
ALTER ROLE
postgres=# \q

Create the dbmail database (PostgreSQL < 8.4.4):

$ createdb -E utf8 -U postgres -O dbmail dbmail
Password:
CREATE DATABASE

Create the dbmail database (PostgreSQL >= 8.4.4):

$ createdb -E utf8 -U postgres -O dbmail dbmail -T template0
Password:
CREATE DATABASE

Copy the ./sql/postgresql/create_tables.pgsql from dbmail-x.x.x.tar.gz to the database server and execute this script on the dbmail database:

$ psql -U dbmail dbmail < create_tables.pgsql
Password for user dbmail:
BEGIN
CREATE SEQUENCE
[...]
CREATE TABLE
CREATE INDEX
COMMIT
$

Copy /etc/dbmail.conf.sample to /etc/dbmail.conf and remove any other/world permissions:

cp /etc/dbmail.conf.sample /etc/dbmail.conf
chmod o-rwx /etc/dbmail.conf

Open /etc/dbmail.conf in an editor and change the following lines to reflect your environment:

driver = pgsql
authdriver = sql
host = 10.0.0.200
user = dbmail
pass = password
db = dbmail

Open /etc/rc.local and add the following above the “echo '.'” line:

if [ -x /usr/local/sbin/dbmail-imapd ]; then
        echo -n ' dbmail-imap'
        /usr/local/sbin/dbmail-imapd > /dev/null
fi

Open /etc/dbmail.conf in an editor and change the following lines to reflect your environment:

driver = postgresql
authdriver = sql
host = 10.0.0.200
user = dbmail
pass = password
db = dbmail
effective_user = _dbmail
effective_group = _dbmail

Open /etc/rc.local and add the following above the “echo '.'” line:

if [ -x /usr/local/sbin/dbmail-imapd ]; then
        echo -n ' dbmail-imap'
	rm -f /var/run/dbmail-imapd.pid > /dev/null
	touch /var/run/dbmail-imapd.pid > /dev/null
	chown _dbmail:_dbmail /var/run/dbmail-imapd.pid > /dev/null
        /usr/local/sbin/dbmail-imapd > /dev/null
fi

Create the _dbmail group and user:

groupadd _dbmail
useradd -d /var/empty -L daemon -s /sbin/nologin -g _dbmail _dbmail

Create dbmail users with:

dbmail-users -a username -W -s address@domain.com