diff --git a/PKGBUILD b/PKGBUILD
index eece3e4e56191901441fd869c120fcbcaefe10d5..38f052c358c3165e0aa395f055542830507b1be8 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -6,34 +6,44 @@
 pkgbase=postfix
 pkgname=(postfix postfix-cdb postfix-ldap postfix-lmdb postfix-mysql
 postfix-pcre postfix-pgsql postfix-sqlite)
-pkgver=3.7.3
-pkgrel=4
+pkgver=3.7.4
+pkgrel=1
 pkgdesc="Fast, easy to administer, secure mail server"
 arch=(x86_64)
 url="http://www.postfix.org/"
 license=(EPL)
 depends=(glibc)
-makedepends=(db icu libldap libnsl libsasl lmdb mariadb-libs openssl pcre2
-postgresql-libs sqlite tinycdb zlib)
+makedepends=(
+  db
+  icu
+  libldap
+  libnsl
+  libsasl
+  lmdb
+  mariadb-libs
+  openssl
+  pcre2
+  postgresql-libs
+  sqlite
+  tinycdb
+  zlib
+)
 source=(
-  https://de.postfix.org/ftpmirror/official/$pkgname-$pkgver.tar.gz
-  $pkgname-$pkgver.tar.gz.sig::https://de.postfix.org/ftpmirror/official/$pkgname-$pkgver.tar.gz.gpg2
-  linux6.patch
-  $pkgname-3.5.8-main_defaults.patch
-  $pkgname.service
-  $pkgname.sysusers
-  $pkgname.tmpfiles
+  https://de.postfix.org/ftpmirror/official/$pkgbase-$pkgver.tar.gz
+  $pkgbase-$pkgver.tar.gz.sig::https://de.postfix.org/ftpmirror/official/$pkgbase-$pkgver.tar.gz.gpg2
+  $pkgbase-3.5.8-main_defaults.patch
+  $pkgbase.service
+  $pkgbase.sysusers
+  $pkgbase.tmpfiles
 )
-sha512sums=('4ceedd1b7b364f47a3becc041cf29a48aea54e38306fd1227c5a7c25894831fb5c37150d99d781d237175e58da21ac53887c97d99bb6b715c4988777596ee890'
+sha512sums=('972738291b960c90fe83861d55b1288900416167adb353418956e69bcc709a6daf84fbfde11d573eebba030654d27abc8d55f90661a2b880ccfb3a334064c236'
             'SKIP'
-            '3557a530095b36e9e3db4e085dbdff1ed9a52a1e14113cbf7f2a5e3406516bac1f58b346c236133aebdece2a77bbedac09b1ce06ee6b6bd75497454741bff8e7'
             '7b2785aa8120ca3ff91b405baf675e9e11f8d58b18a9b842672e7ae30932febddac10556a70823d8746fcb160bceb4dbabdee45cf46b02fc0127057656fb85c4'
             '27f54747ad480d65b560c9dbc97e12c6353e4bceca0ffe3e358e31de56db0ad79928164c9f8790c73a9f791daa378253d2ee29b5a766661778553ec889b2cf97'
             'a7f15970f613ae7b98ce1b84ca0a6034ce3cc7b2b9ce7160dad9731f740fb762f4a54f44acceb5f06f8744fa9e952b088086af8a69da388a600b742a3cda37f2'
             'd08574a6acd595fc146513c92dc1bb341c3432d67de1e93ab73a7ce60e385dd34f3a55e3d3d7aec5f358ac4aae260f028599ac47650ebc663cea3043a760a7bc')
-b2sums=('005abf49b27e59bd3e3251e345df4da0c830314c4d4478aee11057163166afa1a0159017c46bead6572d29d9738a18e1a42a0b72fe260facd3ad77f8ed309271'
+b2sums=('edb716ef4576d339189f11b535a62f3c6f8f28613723d916f13cdd2d37228aa8768dacdb9d8616c83f0ded3a3c801c45747375ea6cfa505b668a7163c4637128'
         'SKIP'
-        'a978f3a02f6aef4bfd48f7ea1e373e37c0f1471afad1c98224a23e5f63b63ed679d7b29043dc4c8baefb6af20228876c496d532499e9335c15d7596f20f525b5'
         'b5f19e0619f1fb017cd889c14e341c21146b3afe7b9eefcdb7fb1eb83a357434b899d1e92f3ab0023c78ef8f2de6ae54c4599ee0f0bd04d257f4ca0a4dc9a16c'
         '02dd441cf6e4a7c2bc0de876f020b0784d811f77a5c6102dd075d67b07158dbc53c8b4d62bc8035283d4f349008574b1c3fac03f4519d56ffd809cb5bcfb7bea'
         'db58b7deb24cea16fb84f56680f0000683f72e11a95039969878e3819607aad5e65af9d9f50007e7710609065c0e3ebb9b30c1d929162b74eca5e74434d82cf1'
@@ -51,14 +61,12 @@ _pick() {
 }
 
 prepare() {
-  # support Linux 6.x
-  patch -Np2 -d $pkgbase-$pkgver -i ../linux6.patch
   # add distribution defaults to main.cf (alias_maps and alias_database)
   patch -Np1 -d $pkgbase-$pkgver -i ../$pkgbase-3.5.8-main_defaults.patch
 }
 
 build() {
-  local _ccargs=(
+  local ccargs=(
     '-fPIC' '-fcommon'
     '-DUSE_SASL_AUTH'
     '-DUSE_CYRUS_SASL' '-I/usr/include/sasl'
@@ -77,26 +85,26 @@ build() {
     '-DDEF_README_DIR=\"/usr/share/doc/postfix\"'
     '-DDEF_MANPAGE_DIR=\"/usr/share/man\"'
   )
+  # NOTE: descriptions of options in makedefs
+  local make_options=(
+    DEBUG=''
+    pie=yes
+    shared=yes
+    dynamicmaps=yes
+    CCARGS="${ccargs[*]}"
+    AUXLIBS="$(pkgconf --libs openssl libsasl2) -lnsl"
+    AUXLIBS_LDAP='-lldap -llber'
+    AUXLIBS_LMDB="$(pkgconf --libs lmdb)"
+    AUXLIBS_PCRE="$(pcre2-config --libs8)"
+    AUXLIBS_MYSQL="$(pkgconf --libs mariadb)"
+    AUXLIBS_PGSQL="$(pkgconf --libs libpq)"
+    AUXLIBS_SQLITE="$(pkgconf --libs sqlite3)"
+    AUXLIBS_CDB='-lcdb'
+    SHLIB_RPATH="-Wl,-rpath,/usr/lib/postfix $LDFLAGS"
+    OPT="$CFLAGS $CPPFLAGS $LDFLAGS"
+  )
 
-  # NOTE: descriptions of variables in makedefs
-  make makefiles \
-    DEBUG='' \
-    pie=yes \
-    shared=yes \
-    dynamicmaps=yes \
-    CCARGS="${_ccargs[*]}" \
-    AUXLIBS="$(pkgconf --libs openssl libsasl2) -lnsl" \
-    AUXLIBS_LDAP='-lldap -llber' \
-    AUXLIBS_LMDB="$(pkgconf --libs lmdb)" \
-    AUXLIBS_PCRE="$(pcre2-config --libs8)" \
-    AUXLIBS_MYSQL="$(pkgconf --libs mariadb)" \
-    AUXLIBS_PGSQL="$(pkgconf --libs libpq)" \
-    AUXLIBS_SQLITE="$(pkgconf --libs sqlite3)" \
-    AUXLIBS_CDB='-lcdb' \
-    SHLIB_RPATH="-Wl,-rpath,/usr/lib/postfix $LDFLAGS" \
-    OPT="$CFLAGS $CPPFLAGS $LDFLAGS" \
-    -C $pkgbase-$pkgver
-
+  make makefiles "${make_options[@]}" -C $pkgbase-$pkgver
   make -C $pkgbase-$pkgver
 }
 
@@ -108,7 +116,14 @@ package_postfix() {
   local _files_file="$pkgdir/etc/$pkgbase/$pkgbase-files"
   local _files_dir="$pkgdir/etc/$pkgbase/$pkgbase-files.d"
 
-  depends+=(db libsasl openssl zlib libicuuc.so libnsl.so)
+  depends+=(
+    db
+    icu libicuuc.so
+    libnsl libnsl.so
+    libsasl libsasl2.so
+    openssl libcrypto.so libssl.so
+    zlib
+  )
   optdepends=(
     'perl: for postfix-collate.pl, postfix-tlstype.pl and qshape'
     'postfix-cdb: for CDB integration'
@@ -193,49 +208,70 @@ package_postfix() {
 }
 
 package_postfix-cdb() {
-  depends+=(postfix libcdb.so)
+  depends+=(
+    postfix
+    tinycdb libcdb.so
+  )
   pkgdesc+=' (CDB integration)'
 
   mv -v $pkgname/* "$pkgdir"
 }
 
 package_postfix-ldap() {
-  depends+=(postfix libldap)
+  depends+=(
+    libldap
+    postfix
+  )
   pkgdesc+=' (LDAP integration)'
 
   mv -v $pkgname/* "$pkgdir"
 }
 
 package_postfix-lmdb() {
-  depends+=(lmdb postfix)
+  depends+=(
+    lmdb
+    postfix
+  )
   pkgdesc+=' (LMDB integration)'
 
   mv -v $pkgname/* "$pkgdir"
 }
 
 package_postfix-mysql() {
-  depends+=(postfix libmariadb.so)
+  depends+=(
+    mariadb-libs libmariadb.so
+    postfix
+  )
   pkgdesc+=' (MySQL integration)'
 
   mv -v $pkgname/* "$pkgdir"
 }
 
 package_postfix-pcre() {
-  depends+=(pcre2 postfix)
+  depends+=(
+    pcre2 libpcre2-8.so
+    postfix
+  )
   pkgdesc+=' (PCRE integration)'
 
   mv -v $pkgname/* "$pkgdir"
 }
 
 package_postfix-pgsql() {
-  depends+=(postfix libpq.so)
+  depends+=(
+    postfix
+    postgresql-libs libpq.so
+  )
   pkgdesc+=' (PostgreSQL integration)'
 
   mv -v $pkgname/* "$pkgdir"
 }
 
 package_postfix-sqlite() {
-  depends+=(postfix sqlite)
+  depends+=(
+    postfix
+    sqlite libsqlite3.so
+  )
   pkgdesc+=' (SQLite integration)'
 
   mv -v $pkgname/* "$pkgdir"
diff --git a/linux6.patch b/linux6.patch
deleted file mode 100644
index 3bdaa9d224b79b0d3e9cbad2f9e403dbb40f65e6..0000000000000000000000000000000000000000
--- a/linux6.patch
+++ /dev/null
@@ -1,38 +0,0 @@
-From b65530350fa4a7eee40946160fd80c3e1e0b63e5 Mon Sep 17 00:00:00 2001
-From: Wietse Venema <wietse@porcupine.org>
-Date: Thu, 6 Oct 2022 00:00:00 -0500
-Subject: [PATCH] postfix-3.8-20221006
-
----
- postfix/makedefs            | 3 ++-
- postfix/src/util/sys_defs.h | 3 ++-
- 2 files changed, 4 insertions(+), 2 deletions(-)
-
-diff --git a/postfix/makedefs b/postfix/makedefs
-index 2839f3a8..9e061b37 100644
---- a/postfix/makedefs
-+++ b/postfix/makedefs
-@@ -627,7 +627,8 @@ EOF
- 		: ${SHLIB_ENV="LD_LIBRARY_PATH=`pwd`/lib"}
- 		: ${PLUGIN_LD="${CC-gcc} -shared"}
- 		;;
-- Linux.[345].*)	SYSTYPE=LINUX$RELEASE_MAJOR
-+    Linux.[3456].*)
-+		SYSTYPE=LINUX$RELEASE_MAJOR
- 		case "$CCARGS" in
- 		 *-DNO_DB*) ;;
- 		 *-DHAS_DB*) ;;
-diff --git a/postfix/src/util/sys_defs.h b/postfix/src/util/sys_defs.h
-index c9ebc337..37e460f9 100644
---- a/postfix/src/util/sys_defs.h
-+++ b/postfix/src/util/sys_defs.h
-@@ -751,7 +751,8 @@ extern int initgroups(const char *, int);
-  /*
-   * LINUX.
-   */
--#if defined(LINUX2) || defined(LINUX3) || defined(LINUX4) || defined(LINUX5)
-+#if defined(LINUX2) || defined(LINUX3) || defined(LINUX4) || defined(LINUX5) \
-+	|| defined(LINUX6)
- #define SUPPORTED
- #define UINT32_TYPE	unsigned int
- #define UINT16_TYPE	unsigned short