diff --git a/pkgs/servers/mail/postfix/0001-Fix-build-with-glibc-2.30.patch b/pkgs/servers/mail/postfix/0001-Fix-build-with-glibc-2.30.patch
deleted file mode 100644
index 9613b8906a00..000000000000
--- a/pkgs/servers/mail/postfix/0001-Fix-build-with-glibc-2.30.patch
+++ /dev/null
@@ -1,34 +0,0 @@
-From a6a61d0dc018101a9a8d0a664f31140d7e38db0e Mon Sep 17 00:00:00 2001
-From: Maximilian Bosch <maximilian@mbosch.me>
-Date: Fri, 17 Jan 2020 01:42:40 +0100
-Subject: [PATCH] Fix build with glibc 2.30
-
-https://bugs.launchpad.net/ubuntu/+source/postfix/+bug/1842923
----
- src/dns/dns_str_resflags.c | 6 ++++++
- 1 file changed, 6 insertions(+)
-
-diff --git a/src/dns/dns_str_resflags.c b/src/dns/dns_str_resflags.c
-index 5f2cce5..df32345 100644
---- a/src/dns/dns_str_resflags.c
-+++ b/src/dns/dns_str_resflags.c
-@@ -60,10 +60,16 @@ static const LONG_NAME_MASK resflag_table[] = {
-     "RES_DEFNAMES", RES_DEFNAMES,
-     "RES_STAYOPEN", RES_STAYOPEN,
-     "RES_DNSRCH", RES_DNSRCH,
-+#ifdef RES_INSECURE1
-     "RES_INSECURE1", RES_INSECURE1,
-+#endif
-+#ifdef RES_INSECURE2
-     "RES_INSECURE2", RES_INSECURE2,
-+#endif
-     "RES_NOALIASES", RES_NOALIASES,
-+#ifdef RES_USE_INET6
-     "RES_USE_INET6", RES_USE_INET6,
-+#endif
- #ifdef RES_ROTATE
-     "RES_ROTATE", RES_ROTATE,
- #endif
--- 
-2.23.1
-
diff --git a/pkgs/servers/mail/postfix/default.nix b/pkgs/servers/mail/postfix/default.nix
index 0386bcf2394b..3b14fab68753 100644
--- a/pkgs/servers/mail/postfix/default.nix
+++ b/pkgs/servers/mail/postfix/default.nix
@@ -26,11 +26,11 @@ in stdenv.mkDerivation rec {
 
   pname = "postfix";
 
-  version = "3.4.10";
+  version = "3.5.2";
 
   src = fetchurl {
     url = "ftp://ftp.cs.uu.nl/mirror/postfix/postfix-release/official/${pname}-${version}.tar.gz";
-    sha256 = "0m36wn5grm4cf8nnvlgsgwsm6v09xz01n7jnx13h0yjk73y6d2lh";
+    sha256 = "1hxy9458apnzfg4n0alncsdgy5dwzn5dbn4xm46iv15xynbj9gz3";
   };
 
   nativeBuildInputs = [ makeWrapper m4 ];
@@ -48,7 +48,6 @@ in stdenv.mkDerivation rec {
     ./postfix-3.0-no-warnings.patch
     ./post-install-script.patch
     ./relative-symlinks.patch
-    ./0001-Fix-build-with-glibc-2.30.patch
   ];
 
   postPatch = stdenv.lib.optionalString (stdenv.hostPlatform != stdenv.buildPlatform) ''