diff --git a/postfix-pgsql/README b/postfix-pgsql/README
new file mode 100644
index 0000000..51f192d
--- /dev/null
+++ b/postfix-pgsql/README
@@ -0,0 +1,25 @@
+Postfix is Wietse Venema's mailer that started life as an alternative to the
+widely-used Sendmail program. It attempts to be fast, easy to administer, and
+secure, while at the same time, being sendmail compatible enough to not upset
+existing users. Thus, the outside has a sendmail-ish flavor, but the inside is
+completely different.
+
+This script builds postfix with support for Dovecot SASL, Cyrus SASL, and
+TLS (using OpenSSL.) Support for Berkeley DB hash and btree maps, being a
+Postfix requirement, is also detected and built.
+
+In addition database plugins are built for LDAP, MySQL, PCRE and sqlite3. To
+add support for additional database plugins which are not provided in
+Slackware, such as CDB or PostgreSQL, it is necessary to recompile this
+package. See the comments in the SlackBuild script to get started.
+
+Postfix manual sections follow the BSD standard, where section 8 is only for
+daemons, and all user commands, even root-user-only administrative commands
+such as postfix(1), are in section 1.
+
+Postfix is exceptionally well documented. If you put a link to your
+html_directory (/usr/doc/postfix/html) somewhere you can find it in your
+favorite browser, all of this will be readily available to you. The place
+to start is not with man pages, but with the various READMEs, all HTMLified
+and with convenient hyperlinks to the relevant anchors in the HTML versions
+of the manuals.
diff --git a/postfix-pgsql/postfix-pgsql.SlackBuild b/postfix-pgsql/postfix-pgsql.SlackBuild
new file mode 100755
index 0000000..dc2ab8b
--- /dev/null
+++ b/postfix-pgsql/postfix-pgsql.SlackBuild
@@ -0,0 +1,115 @@
+#!/bin/sh
+#
+# Copyright 2006, 2011  Alan Hicks, Lizella, GA
+# Copyright 2010, 2011, 2013, 2014, 2015, 2016, 2017  Mario Preksavec, Zagreb, Croatia
+# Copyright 2017, 2018  Patrick J. Volkerding, Sebeka, MN USA
+# Copyright 2020  Eugen Wissner, Dachau, Germany
+# All rights reserved.
+#
+# Redistribution and use of this script, with or without modification, is
+# permitted provided that the following conditions are met:
+#
+# 1. Redistributions of this script must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+#
+#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
+#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
+#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+PRGNAM=postfix-pgsql
+VERSION=${VERSION:-3.5.7}
+BUILD=${BUILD:-1}
+TAG=${TAG:-_SBo}
+SRCNAM=postfix
+
+if [ -z "$ARCH" ]; then
+  case "$( uname -m )" in
+    i?86) ARCH=i586 ;;
+    arm*) ARCH=arm ;;
+       *) ARCH=$( uname -m ) ;;
+  esac
+fi
+
+CWD=$(pwd)
+TMP=${TMP:-/tmp/SBo}
+PKG=$TMP/package-$PRGNAM
+OUTPUT=${OUTPUT:-/tmp}
+
+if [ "$ARCH" = "i586" ]; then
+  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
+  LIBDIRSUFFIX=""
+elif [ "$ARCH" = "i686" ]; then
+  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
+  LIBDIRSUFFIX=""
+elif [ "$ARCH" = "x86_64" ]; then
+  SLKCFLAGS="-O2 -fPIC"
+  LIBDIRSUFFIX="64"
+else
+  SLKCFLAGS="-O2"
+  LIBDIRSUFFIX=""
+fi
+
+set -e # Exit on most errors
+
+rm -rf $PKG
+mkdir -p $TMP $PKG $OUTPUT
+cd $TMP
+rm -rf $SRCNAM-$VERSION
+tar xvf $CWD/$SRCNAM-$VERSION.tar.gz
+cd $SRCNAM-$VERSION
+
+chown -R root:root .
+find -L . \
+ \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
+  -o -perm 511 \) -exec chmod 755 {} \+ -o \
+ \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
+  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \+
+
+# Fix postfix-script so that it won't think a symlink in /etc/postfix is
+# group writable. Only warn about regular files there.
+patch -p1 --verbose -i $CWD/postfix.only.warn.regular.files.diff
+
+# Make the postfix startup message look more like the other boot notices:
+patch -p1 --verbose -i $CWD/postfix.script.starting.message.diff
+
+PGSQLARGS="-I/usr/include/postgresql -DHAS_PGSQL"
+
+### CHANGING BUILT-IN DOCUMENTATION PATH SETTINGS
+#
+# If we try to use postfix-$VERSION in any of these paths, we'll get a compile
+# failure: "error: too many decimal points in number"
+# So we're pretty much forced to leave things as postfix expects them.
+PATHARGS="'-DDEF_HTML_DIR=\"/usr/doc/postfix/html\"' \
+  '-DDEF_MANPAGE_DIR=\"/usr/man\"' \
+  '-DDEF_README_DIR=\"/usr/doc/postfix/readme\"'"
+
+make makefiles dynamicmaps=yes pie=yes shared=yes \
+  shlib_directory=/usr/lib${LIBDIRSUFFIX}/postfix/MAIL_VERSION \
+  CCARGS="$PGSQLARGS $PATHARGS" \
+  AUXLIBS_PGSQL="-L/usr/lib${LIBDIRSUFFIX}/postgresql/12/lib -lpq -lz -lm" \
+  OPT="$SLKCFLAGS" DEBUG=""
+make
+
+mkdir -p $PKG/usr/lib${LIBDIRSUFFIX}/postfix/$VERSION
+cp -a lib/postfix-pgsql.so $PKG/usr/lib${LIBDIRSUFFIX}/postfix/$VERSION/
+
+strip --strip-unneeded $PKG/usr/lib${LIBDIRSUFFIX}/postfix/$VERSION/postfix-pgsql.so
+
+mkdir -p $PKG/etc/postfix/dynamicmaps.cf.d
+echo "pgsql	postfix-pgsql.so	dict_pgsql_open" > $PKG/etc/postfix/dynamicmaps.cf.d/pgsql.cf
+
+mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
+cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
+
+mkdir -p $PKG/install
+cat $CWD/slack-desc > $PKG/install/slack-desc
+
+cd $PKG
+/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}
diff --git a/postfix-pgsql/postfix-pgsql.info b/postfix-pgsql/postfix-pgsql.info
new file mode 100644
index 0000000..64a4190
--- /dev/null
+++ b/postfix-pgsql/postfix-pgsql.info
@@ -0,0 +1,10 @@
+PRGNAM="postfix-pgsql"
+VERSION="3.5.7"
+HOMEPAGE="http://www.postfix.org/"
+DOWNLOAD="http://cdn.postfix.johnriley.me/mirrors/postfix-release/official/postfix-3.5.7.tar.gz"
+MD5SUM="cc727f7a332765199ce67bf14753ff08"
+DOWNLOAD_x86_64=""
+MD5SUM_x86_64=""
+REQUIRES="postgresql"
+MAINTAINER="Eugene Wissner"
+EMAIL="belka@caraus.de"
diff --git a/postfix-pgsql/postfix.only.warn.regular.files.diff b/postfix-pgsql/postfix.only.warn.regular.files.diff
new file mode 100644
index 0000000..2b6b788
--- /dev/null
+++ b/postfix-pgsql/postfix.only.warn.regular.files.diff
@@ -0,0 +1,11 @@
+--- ./conf/postfix-script.orig	2016-01-31 15:05:46.000000000 -0600
++++ ./conf/postfix-script	2017-11-05 15:09:40.838097647 -0600
+@@ -275,7 +275,7 @@
+ 	find $todo ! -user root \
+ 	    -exec $WARN not owned by root: {} \;
+ 
+-	find $todo \( -perm -020 -o -perm -002 \) \
++	find $todo -type f \( -perm -020 -o -perm -002 \) \
+ 	    -exec $WARN group or other writable: {} \;
+ 
+ 	# Check Postfix mail_owner-owned directory tree owner/permissions.
diff --git a/postfix-pgsql/postfix.script.starting.message.diff b/postfix-pgsql/postfix.script.starting.message.diff
new file mode 100644
index 0000000..c32a953
--- /dev/null
+++ b/postfix-pgsql/postfix.script.starting.message.diff
@@ -0,0 +1,14 @@
+--- ./conf/postfix-script.orig	2019-02-28 13:02:24.783759137 -0600
++++ ./conf/postfix-script	2019-02-28 13:05:25.516761071 -0600
+@@ -139,7 +139,10 @@
+ 		# Foreground this so it can be stopped. All inodes are cached.
+ 		$daemon_directory/postfix-script check-warn
+ 	fi
+-	$INFO starting the Postfix mail system || exit 1
++	$INFO starting the Postfix mail system > /dev/null 2> /dev/null || exit 1
++	# Because this is called during Slackware init, let's make it look
++	# similar to everything else printed on the screen:
++	echo "Starting the Postfix mail system:  $command_directory/postfix start"
+ 	case $1 in
+ 	start)
+ 	    # NOTE: wait in foreground process to get the initialization status.
diff --git a/postfix-pgsql/slack-desc b/postfix-pgsql/slack-desc
new file mode 100644
index 0000000..0717ed7
--- /dev/null
+++ b/postfix-pgsql/slack-desc
@@ -0,0 +1,19 @@
+# HOW TO EDIT THIS FILE:
+# The "handy ruler" below makes it easier to edit a package description.
+# Line up the first '|' above the ':' following the base package name, and
+# the '|' on the right side marks the last column you can put a character in.
+# You must make exactly 11 lines for the formatting to be correct. It's also
+# customary to leave one space after the ':' except on otherwise blank lines.
+
+             |-----handy-ruler------------------------------------------------------|
+postfix-pgsql: postfix (mail transport and submission agent)
+postfix-pgsql:
+postfix-pgsql: Postfix attempts to be fast, easy to administer, and secure, while at
+postfix-pgsql: the same time being sendmail compatible enough to not upset existing
+postfix-pgsql: users. Thus, the outside has a sendmail-ish flavor, but the inside is
+postfix-pgsql: completely different.
+postfix-pgsql:
+postfix-pgsql: Homepage: http://www.postfix.org
+postfix-pgsql:
+postfix-pgsql:
+postfix-pgsql: