diff --git a/Makefile.in b/Makefile.in
index e2f1290e..30599345 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -16,9 +16,9 @@ localstatedir = @localstatedir@
 CC = @CC@
 CFLAGS = @CFLAGS@ @CPPFLAGS@
 DEFS = @defs@
-INCDIR = -I. @INCDIR@ @mysql_includes@
+INCDIR = -I. @INCDIR@ @sql_includes@
 LIBDIR = -L. @LIBDIR@ @LDFLAGS@
-LIBS = @LIBS@ @mysql_libs@
+LIBS = @LIBS@ @sql_libs@
 RUNNING_USER = @RUNNING_USER@
 RUNNING_GROUP = `@id_bin@ -gn $(RUNNING_USER)`
 
diff --git a/configure b/configure
index 07fb9ef2..4157c797 100755
--- a/configure
+++ b/configure
@@ -623,13 +623,14 @@ ac_subst_vars='LTLIBOBJS
 LIBOBJS
 DATADIR
 CFGDIR
+PSQL_CONFIG
 MYSQL_CONFIG
 iv
 id_bin
 libclamav_extra_libs
-mysql_obj
-mysql_libs
-mysql_includes
+sql_obj
+sql_libs
+sql_includes
 MAKE
 SUBDIRS
 RUNNING_USER
@@ -699,6 +700,7 @@ enable_starttls
 enable_tcpwrappers
 enable_multitenancy
 enable_tweak_sent_time
+with_database
 with_piler_user
 '
       ac_precious_vars='build_alias
@@ -1328,6 +1330,7 @@ Optional Features:
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
   --without-PACKAGE       do not use PACKAGE (same as --with-PACKAGE=no)
+  --with-database[=mysql|psql]  use either mysql or psql database for storing data (default: none)
   --with-piler-user=username      what user the piler daemon shall be run as
 
 Some influential environment variables:
@@ -3436,6 +3439,7 @@ have_clamd="no"
 
 have_antivirus="no"
 have_mysql="no"
+have_psql="no"
 have_tre="no"
 have_zip="no"
 have_zlib="no"
@@ -3458,7 +3462,7 @@ antispam_libs="-lz -lm -ldl -lcrypto -lssl"
 defs=""
 objs=""
 user_obj=""
-mysql_obj=""
+sql_obj=""
 os=`uname -s`
 
 id_bin="id"
@@ -4247,7 +4251,18 @@ if test "$have_zlib" = "no"; then
 fi
 
 
-# Extract the first word of "mysql_config", so it can be a program name with args.
+
+# Check whether --with-database was given.
+if test "${with_database+set}" = set; then :
+  withval=$with_database;
+   if test "$withval" != "no" -a "$withval" != "yes"; then
+      DATABASE=$withval
+   fi
+
+
+   if test "$withval" = "mysql"; then
+
+      # Extract the first word of "mysql_config", so it can be a program name with args.
 set dummy mysql_config; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
@@ -4285,16 +4300,17 @@ fi
 
 
 
-if test x$MYSQL_CONFIG = xyes; then
-   have_mysql="yes"
-fi
+      if test x$MYSQL_CONFIG = xyes; then
+         have_mysql="yes"
+      fi
 
-if test "$have_mysql" = "yes"; then
+      if test "$have_mysql" = "yes"; then
 
-   mysql_includes=`mysql_config --cflags`
-   mysql_libs=`mysql_config --libs_r`
+         sql_includes=`mysql_config --cflags`
+         sql_libs=`mysql_config --libs_r`
+         sql_obj="mysql.o"
 
-   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for main in -lguide" >&5
+         { $as_echo "$as_me:${as_lineno-$LINENO}: checking for main in -lguide" >&5
 $as_echo_n "checking for main in -lguide... " >&6; }
 if ${ac_cv_lib_guide_main+:} false; then :
   $as_echo_n "(cached) " >&6
@@ -4370,10 +4386,72 @@ fi
 fi
 ac_cv_lib_guide=ac_cv_lib_guide_main
 
+      else
+         echo "MySQL support is not found"
+         exit 1;
+      fi
+   fi
+
+
+   if test "$withval" = "psql"; then
+
+      # Extract the first word of "pg_config", so it can be a program name with args.
+set dummy pg_config; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_PSQL_CONFIG+:} false; then :
+  $as_echo_n "(cached) " >&6
 else
-   echo "MySQL support is not found"
-   exit 1;
+  if test -n "$PSQL_CONFIG"; then
+  ac_cv_prog_PSQL_CONFIG="$PSQL_CONFIG" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_PSQL_CONFIG="yes"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
 fi
+fi
+PSQL_CONFIG=$ac_cv_prog_PSQL_CONFIG
+if test -n "$PSQL_CONFIG"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $PSQL_CONFIG" >&5
+$as_echo "$PSQL_CONFIG" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+
+      if test x$PSQL_CONFIG = xyes; then
+         have_psql="yes"
+      fi
+
+      if test "$have_psql" = "yes"; then
+
+         sql_includes="-I`pg_config --includedir`"
+         sql_libs="-L`pg_config --libdir`"
+         sql_obj="psql.o"
+
+      else
+         echo "PSQL support is not found"
+         exit 1;
+      fi
+   fi
+
+
+fi
+
 
 
 
@@ -4449,6 +4527,12 @@ _ACEOF
 
 
 
+if test "$have_mysql" = "no" && test "$have_psql" = "no"; then
+   echo
+   echo "please specify the used database with --with-database=..."
+   echo
+   exit 1
+fi
 
 
 
@@ -4498,6 +4582,15 @@ fi
 
 echo
 
+if test "$have_mysql" = "yes"; then
+   echo "database: mysql"
+fi
+
+if test "$have_psql" = "yes"; then
+   echo "database: psql"
+fi
+
+
 if test "$have_tre" = "yes"; then
    echo "tre library: yes"
    defs="$defs -DHAVE_TRE"
@@ -4555,7 +4648,7 @@ if test "$have_mysql" = "yes"; then
 fi
 
 if test "$have_icc_guide" = "yes" && test "$have_mysql" = "yes"; then
-   mysql_libs="$mysql_libs -lguide"
+   sql_libs="$sql_libs -lguide"
 fi
 
 if test "$have_multitenancy" = "yes"; then
@@ -4653,7 +4746,7 @@ echo; echo
 
 CFLAGS="$static -O2 -Wall -g"
 LIBS="$antispam_libs $sunos_libs "
-OBJS="dirs.o base64.o misc.o counters.o cfg.o sig.o decoder.o list.o parser.o parser_utils.o rules.o session.o message.o attachment.o digest.o store.o archive.o tai.o import.o imap.o pop3.o extract.o mydomains.o retr.o mysql.o $objs"
+OBJS="dirs.o base64.o misc.o counters.o cfg.o sig.o decoder.o list.o parser.o parser_utils.o rules.o session.o message.o attachment.o digest.o store.o archive.o tai.o import.o imap.o pop3.o extract.o mydomains.o retr.o $objs"
 
 ac_config_files="$ac_config_files Makefile src/Makefile etc/Makefile util/Makefile init.d/Makefile test/Makefile contrib/imap/Makefile"
 
diff --git a/configure.in b/configure.in
index 70190644..20a41063 100644
--- a/configure.in
+++ b/configure.in
@@ -24,9 +24,9 @@ AC_SUBST(OBJS)
 AC_SUBST(RUNNING_USER)
 AC_SUBST(SUBDIRS)
 AC_SUBST(MAKE)
-AC_SUBST(mysql_includes)
-AC_SUBST(mysql_libs)
-AC_SUBST(mysql_obj)
+AC_SUBST(sql_includes)
+AC_SUBST(sql_libs)
+AC_SUBST(sql_obj)
 AC_SUBST(libclamav_extra_libs)
 AC_SUBST(id_bin)
 AC_SUBST(iv)
@@ -37,6 +37,7 @@ have_clamd="no"
 
 have_antivirus="no"
 have_mysql="no"
+have_psql="no"
 have_tre="no"
 have_zip="no"
 have_zlib="no"
@@ -59,7 +60,7 @@ antispam_libs="-lz -lm -ldl -lcrypto -lssl"
 defs=""
 objs=""
 user_obj=""
-mysql_obj=""
+sql_obj=""
 os=`uname -s`
 
 id_bin="id"
@@ -182,23 +183,57 @@ if test "$have_zlib" = "no"; then
 fi
 
 
-AC_CHECK_PROG(MYSQL_CONFIG, mysql_config, yes)
+AC_ARG_WITH(database,
+[  --with-database[[=mysql|psql]]  use either mysql or psql database for storing data (default: none)],[
+   if test "$withval" != "no" -a "$withval" != "yes"; then
+      DATABASE=$withval
+   fi
 
-if test x$MYSQL_CONFIG = xyes; then
-   have_mysql="yes"
-fi
 
-if test "$have_mysql" = "yes"; then
+   if test "$withval" = "mysql"; then
 
-   mysql_includes=`mysql_config --cflags`
-   mysql_libs=`mysql_config --libs_r`
+      AC_CHECK_PROG(MYSQL_CONFIG, mysql_config, yes)
 
-   AC_CHECK_LIB([guide],[main],[AC_CHECK_LIB(guide, _intel_fast_memset, have_icc_guide=yes, have_icc_guide=no)],[],[])ac_cv_lib_guide=ac_cv_lib_guide_main
+      if test x$MYSQL_CONFIG = xyes; then
+         have_mysql="yes"
+      fi
 
-else
-   echo "MySQL support is not found"
-   exit 1;
-fi
+      if test "$have_mysql" = "yes"; then
+
+         sql_includes=`mysql_config --cflags`
+         sql_libs=`mysql_config --libs_r`
+         sql_obj="mysql.o"
+
+         AC_CHECK_LIB([guide],[main],[AC_CHECK_LIB(guide, _intel_fast_memset, have_icc_guide=yes, have_icc_guide=no)],[],[])ac_cv_lib_guide=ac_cv_lib_guide_main
+
+      else
+         echo "MySQL support is not found"
+         exit 1;
+      fi
+   fi
+
+
+   if test "$withval" = "psql"; then
+
+      AC_CHECK_PROG(PSQL_CONFIG, pg_config, yes)
+
+      if test x$PSQL_CONFIG = xyes; then
+         have_psql="yes"
+      fi
+
+      if test "$have_psql" = "yes"; then
+
+         sql_includes="-I`pg_config --includedir`"
+         sql_libs="-L`pg_config --libdir`"
+         sql_obj="psql.o"
+
+      else
+         echo "PSQL support is not found"
+         exit 1;
+      fi
+   fi
+
+])
 
 
 
@@ -257,6 +292,12 @@ AC_DEFINE_UNQUOTED(VIRUS_TEMPLATE, "$my_prefix/share/clapf/template.virus", [whe
 AC_DEFINE_UNQUOTED(ZOMBIE_NET_REGEX, "$my_prefix/share/clapf/zombienets.regex", [where the virus template is])
 
 
+if test "$have_mysql" = "no" && test "$have_psql" = "no"; then
+   echo
+   echo "please specify the used database with --with-database=..."
+   echo
+   exit 1
+fi
 
 
 dnl let us know if we are building on FreeBSD
@@ -302,6 +343,15 @@ fi
 
 echo
 
+if test "$have_mysql" = "yes"; then
+   echo "database: mysql"
+fi
+
+if test "$have_psql" = "yes"; then
+   echo "database: psql"
+fi
+
+
 if test "$have_tre" = "yes"; then
    echo "tre library: yes"
    defs="$defs -DHAVE_TRE"
@@ -347,7 +397,7 @@ if test "$have_mysql" = "yes"; then
 fi
 
 if test "$have_icc_guide" = "yes" && test "$have_mysql" = "yes"; then
-   mysql_libs="$mysql_libs -lguide"
+   sql_libs="$sql_libs -lguide"
 fi
 
 if test "$have_multitenancy" = "yes"; then
@@ -417,7 +467,7 @@ echo; echo
 
 CFLAGS="$static -O2 -Wall -g"
 LIBS="$antispam_libs $sunos_libs "
-OBJS="dirs.o base64.o misc.o counters.o cfg.o sig.o decoder.o list.o parser.o parser_utils.o rules.o session.o message.o attachment.o digest.o store.o archive.o tai.o import.o imap.o pop3.o extract.o mydomains.o retr.o mysql.o $objs"
+OBJS="dirs.o base64.o misc.o counters.o cfg.o sig.o decoder.o list.o parser.o parser_utils.o rules.o session.o message.o attachment.o digest.o store.o archive.o tai.o import.o imap.o pop3.o extract.o mydomains.o retr.o $objs"
 
 AC_CONFIG_FILES([Makefile src/Makefile etc/Makefile util/Makefile init.d/Makefile test/Makefile contrib/imap/Makefile])
 AC_OUTPUT
diff --git a/etc/Makefile.in b/etc/Makefile.in
index 1d70bc17..77b50862 100644
--- a/etc/Makefile.in
+++ b/etc/Makefile.in
@@ -16,9 +16,9 @@ localstatedir = @localstatedir@
 CC = @CC@
 CFLAGS = @CFLAGS@ @CPPFLAGS@
 DEFS = @defs@
-INCDIR = -I. -I../.. -I../../src @INCDIR@ @mysql_includes@
+INCDIR = -I. -I../.. -I../../src @INCDIR@ @sql_includes@
 LIBDIR = -L. @LIBDIR@ @LDFLAGS@ -L../../src
-LIBS = @LIBS@ @mysql_libs@
+LIBS = @LIBS@ @sql_libs@
 RUNNING_USER = @RUNNING_USER@
 RUNNING_GROUP = `@id_bin@ -gn $(RUNNING_USER)`
 
diff --git a/src/Makefile.in b/src/Makefile.in
index df72f90f..23433df2 100644
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -16,11 +16,11 @@ localstatedir = @localstatedir@
 CC = @CC@
 CFLAGS = @CFLAGS@ @CPPFLAGS@
 DEFS = @defs@
-INCDIR = -I. -I.. @INCDIR@ @mysql_includes@
+INCDIR = -I. -I.. @INCDIR@ @sql_includes@
 LIBDIR = -L. @LIBDIR@ @LDFLAGS@
-LIBS = @LIBS@ @mysql_libs@
+LIBS = @LIBS@ @sql_libs@
 OBJS = @OBJS@
-MYSQL_OBJS = @mysql_obj@
+SQL_OBJS = @sql_obj@
 RUNNING_USER = @RUNNING_USER@
 RUNNING_GROUP = `@id_bin@ -gn $(RUNNING_USER)`
 
@@ -43,10 +43,10 @@ piler: piler.c libpiler.a
 pilergetd: pilergetd.c libpiler.a
 	$(CC) $(CFLAGS) $(INCDIR) $(DEFS) -o $@ $< -lpiler $(LIBS) $(LIBDIR) @LDFLAGS@ @libclamav_extra_libs@
 
-libpiler.a: $(OBJS) $(MYSQL_OBJS)
-	ar cr libpiler.a $(OBJS) $(MYSQL_OBJS)
+libpiler.a: $(OBJS) $(SQL_OBJS)
+	ar cr libpiler.a $(OBJS) $(SQL_OBJS)
 	ranlib libpiler.a
-	$(CC) -shared -o libpiler.so.$(LIBPILER_VERSION) $(OBJS) $(MYSQL_OBJS)
+	$(CC) -shared -o libpiler.so.$(LIBPILER_VERSION) $(OBJS) $(SQL_OBJS)
 	ln -sf libpiler.so.$(LIBPILER_VERSION) libpiler.so
 	ln -sf libpiler.so.$(LIBPILER_VERSION) libpiler.so.$(PILER_VERSION)
 
diff --git a/test/Makefile.in b/test/Makefile.in
index c571a813..207622c0 100644
--- a/test/Makefile.in
+++ b/test/Makefile.in
@@ -16,9 +16,9 @@ localstatedir = @localstatedir@
 CC = @CC@
 CFLAGS = @CFLAGS@ @CPPFLAGS@
 DEFS = @defs@
-INCDIR = -I. -I.. -I../.. -I../../src -I../src @INCDIR@ @mysql_includes@
+INCDIR = -I. -I.. -I../.. -I../../src -I../src @INCDIR@ @sql_includes@
 LIBDIR = -L. @LIBDIR@ @LDFLAGS@ -L../src
-LIBS = @LIBS@ @mysql_libs@
+LIBS = @LIBS@ @sql_libs@
 RUNNING_USER = @RUNNING_USER@
 RUNNING_GROUP = `@id_bin@ -gn $(RUNNING_USER)`
 OBJS = import_helper.o
diff --git a/util/Makefile.in b/util/Makefile.in
index 88b4e7ae..d2d05c69 100644
--- a/util/Makefile.in
+++ b/util/Makefile.in
@@ -16,9 +16,9 @@ localstatedir = @localstatedir@
 CC = @CC@
 CFLAGS = @CFLAGS@ @CPPFLAGS@
 DEFS = @defs@
-INCDIR = -I. -I../.. -I../../src @INCDIR@ @mysql_includes@
+INCDIR = -I. -I../.. -I../../src @INCDIR@ @sql_includes@
 LIBDIR = -L. @LIBDIR@ @LDFLAGS@ -L../../src
-LIBS = @LIBS@ @mysql_libs@
+LIBS = @LIBS@ @sql_libs@
 RUNNING_USER = @RUNNING_USER@
 RUNNING_GROUP = `@id_bin@ -gn $(RUNNING_USER)`