Prereq: "3.6.4"
diff -ur --new-file /var/tmp/postfix-3.6.4/src/global/mail_version.h ./src/global/mail_version.h
--- /var/tmp/postfix-3.6.4/src/global/mail_version.h	2022-01-14 17:58:14.000000000 -0500
+++ ./src/global/mail_version.h	2022-02-05 18:24:30.000000000 -0500
@@ -20,8 +20,8 @@
   * Patches change both the patchlevel and the release date. Snapshots have no
   * patchlevel; they change the release date only.
   */
-#define MAIL_RELEASE_DATE	"20220114"
-#define MAIL_VERSION_NUMBER	"3.6.4"
+#define MAIL_RELEASE_DATE	"20220205"
+#define MAIL_VERSION_NUMBER	"3.6.5"
 
 #ifdef SNAPSHOT
 #define MAIL_VERSION_DATE	"-" MAIL_RELEASE_DATE
diff -ur --new-file /var/tmp/postfix-3.6.4/HISTORY ./HISTORY
--- /var/tmp/postfix-3.6.4/HISTORY	2022-01-14 16:21:16.000000000 -0500
+++ ./HISTORY	2022-02-04 15:59:47.000000000 -0500
@@ -25725,3 +25725,13 @@
 	proxy_read_maps default value, based on output from the
 	mantools/missing-proxy-read-maps script.  File:
 	global/mail_params.h.
+
+20220120
+
+	Bitrot: Glibc 2.34 implements closefrom(). File:
+	util/sys_defs.h.
+
+20220202
+
+	Bitrot: Berkeley DB 18 is like Berkeley DB 6. Yasuhiro
+	Kimura. File: util/dict_db.c.
diff -ur --new-file /var/tmp/postfix-3.6.4/src/util/dict_db.c ./src/util/dict_db.c
--- /var/tmp/postfix-3.6.4/src/util/dict_db.c	2018-11-06 17:25:54.000000000 -0500
+++ ./src/util/dict_db.c	2022-02-04 15:55:06.000000000 -0500
@@ -753,7 +753,7 @@
     if (type == DB_HASH && db->set_h_nelem(db, DICT_DB_NELM) != 0)
 	msg_fatal("set DB hash element count %d: %m", DICT_DB_NELM);
     db_base_buf = vstring_alloc(100);
-#if DB_VERSION_MAJOR == 6 || DB_VERSION_MAJOR == 5 || \
+#if DB_VERSION_MAJOR == 18 || DB_VERSION_MAJOR == 6 || DB_VERSION_MAJOR == 5 || \
 	(DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR > 0)
     if ((errno = db->open(db, 0, sane_basename(db_base_buf, db_path),
 			  0, type, db_flags, 0644)) != 0)
diff -ur --new-file /var/tmp/postfix-3.6.4/src/util/sys_defs.h ./src/util/sys_defs.h
--- /var/tmp/postfix-3.6.4/src/util/sys_defs.h	2020-05-21 09:34:23.000000000 -0400
+++ ./src/util/sys_defs.h	2022-01-30 18:20:24.000000000 -0500
@@ -827,6 +827,9 @@
 #define HAVE_POSIX_GETPW_R
 #endif
 #endif
+#if HAVE_GLIBC_API_VERSION_SUPPORT(2, 34)
+#define HAS_CLOSEFROM
+#endif
 
 #endif