9 files changed, 60 insertions, 60 deletions
diff --git a/t/t4014-format-patch.sh b/t/t4014-format-patch.sh
index de1da4673d..533d21fcaf 100755
--- a/t/t4014-format-patch.sh
+++ b/t/t4014-format-patch.sh
@@ -445,13 +445,13 @@ test_expect_success 'no threading' '
 
 cat >expect.thread <<EOF
 ---
-Message-Id: <0>
+Message-ID: <0>
 ---
-Message-Id: <1>
+Message-ID: <1>
 In-Reply-To: <0>
 References: <0>
 ---
-Message-Id: <2>
+Message-ID: <2>
 In-Reply-To: <0>
 References: <0>
 EOF
@@ -462,15 +462,15 @@ test_expect_success 'thread' '
 
 cat >expect.in-reply-to <<EOF
 ---
-Message-Id: <0>
+Message-ID: <0>
 In-Reply-To: <1>
 References: <1>
 ---
-Message-Id: <2>
+Message-ID: <2>
 In-Reply-To: <1>
 References: <1>
 ---
-Message-Id: <3>
+Message-ID: <3>
 In-Reply-To: <1>
 References: <1>
 EOF
@@ -482,17 +482,17 @@ test_expect_success 'thread in-reply-to' '
 
 cat >expect.cover-letter <<EOF
 ---
-Message-Id: <0>
+Message-ID: <0>
 ---
-Message-Id: <1>
+Message-ID: <1>
 In-Reply-To: <0>
 References: <0>
 ---
-Message-Id: <2>
+Message-ID: <2>
 In-Reply-To: <0>
 References: <0>
 ---
-Message-Id: <3>
+Message-ID: <3>
 In-Reply-To: <0>
 References: <0>
 EOF
@@ -503,21 +503,21 @@ test_expect_success 'thread cover-letter' '
 
 cat >expect.cl-irt <<EOF
 ---
-Message-Id: <0>
+Message-ID: <0>
 In-Reply-To: <1>
 References: <1>
 ---
-Message-Id: <2>
+Message-ID: <2>
 In-Reply-To: <0>
 References: <1>
 	<0>
 ---
-Message-Id: <3>
+Message-ID: <3>
 In-Reply-To: <0>
 References: <1>
 	<0>
 ---
-Message-Id: <4>
+Message-ID: <4>
 In-Reply-To: <0>
 References: <1>
 	<0>
@@ -535,13 +535,13 @@ test_expect_success 'thread explicit shallow' '
 
 cat >expect.deep <<EOF
 ---
-Message-Id: <0>
+Message-ID: <0>
 ---
-Message-Id: <1>
+Message-ID: <1>
 In-Reply-To: <0>
 References: <0>
 ---
-Message-Id: <2>
+Message-ID: <2>
 In-Reply-To: <1>
 References: <0>
 	<1>
@@ -553,16 +553,16 @@ test_expect_success 'thread deep' '
 
 cat >expect.deep-irt <<EOF
 ---
-Message-Id: <0>
+Message-ID: <0>
 In-Reply-To: <1>
 References: <1>
 ---
-Message-Id: <2>
+Message-ID: <2>
 In-Reply-To: <0>
 References: <1>
 	<0>
 ---
-Message-Id: <3>
+Message-ID: <3>
 In-Reply-To: <2>
 References: <1>
 	<0>
@@ -576,18 +576,18 @@ test_expect_success 'thread deep in-reply-to' '
 
 cat >expect.deep-cl <<EOF
 ---
-Message-Id: <0>
+Message-ID: <0>
 ---
-Message-Id: <1>
+Message-ID: <1>
 In-Reply-To: <0>
 References: <0>
 ---
-Message-Id: <2>
+Message-ID: <2>
 In-Reply-To: <1>
 References: <0>
 	<1>
 ---
-Message-Id: <3>
+Message-ID: <3>
 In-Reply-To: <2>
 References: <0>
 	<1>
@@ -600,22 +600,22 @@ test_expect_success 'thread deep cover-letter' '
 
 cat >expect.deep-cl-irt <<EOF
 ---
-Message-Id: <0>
+Message-ID: <0>
 In-Reply-To: <1>
 References: <1>
 ---
-Message-Id: <2>
+Message-ID: <2>
 In-Reply-To: <0>
 References: <1>
 	<0>
 ---
-Message-Id: <3>
+Message-ID: <3>
 In-Reply-To: <2>
 References: <1>
 	<0>
 	<2>
 ---
-Message-Id: <4>
+Message-ID: <4>
 In-Reply-To: <3>
 References: <1>
 	<0>
diff --git a/t/t4150-am.sh b/t/t4150-am.sh
index cdad4b6880..95b48103b8 100755
--- a/t/t4150-am.sh
+++ b/t/t4150-am.sh
@@ -103,7 +103,7 @@ test_expect_success setup '
 
 	git format-patch --stdout first >patch1 &&
 	{
-		echo "Message-Id: <1226501681-24923-1-git-send-email-bda@mnsspb.ru>" &&
+		echo "Message-ID: <1226501681-24923-1-git-send-email-bda@mnsspb.ru>" &&
 		echo "X-Fake-Field: Line One" &&
 		echo "X-Fake-Field: Line Two" &&
 		echo "X-Fake-Field: Line Three" &&
@@ -910,7 +910,7 @@ test_expect_success 'am --message-id really adds the message id' '
 	git am --message-id patch1.eml &&
 	test_path_is_missing .git/rebase-apply &&
 	git cat-file commit HEAD | tail -n1 >actual &&
-	grep Message-Id patch1.eml >expected &&
+	grep Message-ID patch1.eml >expected &&
 	test_cmp expected actual
 '
 
@@ -922,7 +922,7 @@ test_expect_success 'am.messageid really adds the message id' '
 	git am patch1.eml &&
 	test_path_is_missing .git/rebase-apply &&
 	git cat-file commit HEAD | tail -n1 >actual &&
-	grep Message-Id patch1.eml >expected &&
+	grep Message-ID patch1.eml >expected &&
 	test_cmp expected actual
 '
 
@@ -933,7 +933,7 @@ test_expect_success 'am --message-id -s signs off after the message id' '
 	git am -s --message-id patch1.eml &&
 	test_path_is_missing .git/rebase-apply &&
 	git cat-file commit HEAD | tail -n2 | head -n1 >actual &&
-	grep Message-Id patch1.eml >expected &&
+	grep Message-ID patch1.eml >expected &&
 	test_cmp expected actual
 '
 
diff --git a/t/t4258/mbox b/t/t4258/mbox
index c62819f3d2..1ae528ba78 100644
--- a/t/t4258/mbox
+++ b/t/t4258/mbox
@@ -2,7 +2,7 @@ From: A U Thor <mail@example.com>
 To: list@example.org
 Subject: [PATCH v2] sample
 Date: Mon,  3 Aug 2020 22:40:55 +0700
-Message-Id: <msg-id@example.com>
+Message-ID: <msg-id@example.com>
 Content-Type: text/plain; charset="utf-8"
 Content-Transfer-Encoding: base64
 
diff --git a/t/t5100/msg0002 b/t/t5100/msg0002
index e2546ec733..1089382425 100644
--- a/t/t5100/msg0002
+++ b/t/t5100/msg0002
@@ -3,7 +3,7 @@ message:
 
 From: Nit Picker <nit.picker@example.net>
 Subject: foo is too old
-Message-Id: <nitpicker.12121212@example.net>
+Message-ID: <nitpicker.12121212@example.net>
 
 Hopefully this would fix the problem stated there.
 
diff --git a/t/t5100/msg0003 b/t/t5100/msg0003
index 1ac68101b1..3402b534a6 100644
--- a/t/t5100/msg0003
+++ b/t/t5100/msg0003
@@ -3,7 +3,7 @@ message:
 
 From: Nit Picker <nit.picker@example.net>
 Subject: foo is too old
-Message-Id: <nitpicker.12121212@example.net>
+Message-ID: <nitpicker.12121212@example.net>
 
 Hopefully this would fix the problem stated there.
 
diff --git a/t/t5100/msg0012--message-id b/t/t5100/msg0012--message-id
index 376e26e9ae..44482958ce 100644
--- a/t/t5100/msg0012--message-id
+++ b/t/t5100/msg0012--message-id
@@ -5,4 +5,4 @@ docutils заменён на python-docutils
 python-docutils. В то время как сам rest2web не нужен.
 
 Signed-off-by: Dmitriy Blinov <bda@mnsspb.ru>
-Message-Id: <1226501681-24923-1-git-send-email-bda@mnsspb.ru>
+Message-ID: <1226501681-24923-1-git-send-email-bda@mnsspb.ru>
diff --git a/t/t5100/quoted-cr.mbox b/t/t5100/quoted-cr.mbox
index 909021bb7a..a529d4de08 100644
--- a/t/t5100/quoted-cr.mbox
+++ b/t/t5100/quoted-cr.mbox
@@ -3,7 +3,7 @@ From: A U Thor <mail@example.com>
 To: list@example.org
 Subject: [PATCH v2] sample
 Date: Mon,  3 Aug 2020 22:40:55 +0700
-Message-Id: <msg-id@example.com>
+Message-ID: <msg-id@example.com>
 Content-Type: text/plain; charset="utf-8"
 Content-Transfer-Encoding: base64
 
@@ -27,7 +27,7 @@ From: A U Thor <mail@example.com>
 To: list@example.org
 Subject: [PATCH v2] sample
 Date: Mon,  3 Aug 2020 22:40:55 +0700
-Message-Id: <msg-id2@example.com>
+Message-ID: <msg-id2@example.com>
 Content-Type: text/plain; charset="utf-8"
 Content-Transfer-Encoding: base64
 
diff --git a/t/t5100/sample.mbox b/t/t5100/sample.mbox
index 6d4d0e4474..4a54ee5171 100644
--- a/t/t5100/sample.mbox
+++ b/t/t5100/sample.mbox
@@ -35,7 +35,7 @@ message:
 
 From: Nit Picker <nit.picker@example.net>
 Subject: foo is too old
-Message-Id: <nitpicker.12121212@example.net>
+Message-ID: <nitpicker.12121212@example.net>
 
 Hopefully this would fix the problem stated there.
 
@@ -78,7 +78,7 @@ message:
 
 From: Nit Picker <nit.picker@example.net>
 Subject: foo is too old
-Message-Id: <nitpicker.12121212@example.net>
+Message-ID: <nitpicker.12121212@example.net>
 
 Hopefully this would fix the problem stated there.
 
@@ -508,7 +508,7 @@ From bda@mnsspb.ru Wed Nov 12 17:54:41 2008
 From: Dmitriy Blinov <bda@mnsspb.ru>
 To: navy-patches@dinar.mns.mnsspb.ru
 Date: Wed, 12 Nov 2008 17:54:41 +0300
-Message-Id: <1226501681-24923-1-git-send-email-bda@mnsspb.ru>
+Message-ID: <1226501681-24923-1-git-send-email-bda@mnsspb.ru>
 X-Mailer: git-send-email 1.5.6.5
 MIME-Version: 1.0
 Content-Type: text/plain;
diff --git a/t/t9001-send-email.sh b/t/t9001-send-email.sh
index 1130ef21b3..5c2c282d08 100755
--- a/t/t9001-send-email.sh
+++ b/t/t9001-send-email.sh
@@ -12,7 +12,7 @@ PREREQ="PERL"
 
 replace_variable_fields () {
 	sed	-e "s/^\(Date:\).*/\1 DATE-STRING/" \
-		-e "s/^\(Message-Id:\).*/\1 MESSAGE-ID-STRING/" \
+		-e "s/^\(Message-ID:\).*/\1 MESSAGE-ID-STRING/" \
 		-e "s/^\(X-Mailer:\).*/\1 X-MAILER-STRING/"
 }
 
@@ -225,7 +225,7 @@ Cc: cc@example.com,
 	two@example.com
 Subject: [PATCH 1/1] Second.
 Date: DATE-STRING
-Message-Id: MESSAGE-ID-STRING
+Message-ID: MESSAGE-ID-STRING
 X-Mailer: X-MAILER-STRING
 In-Reply-To: <unique-message-id@example.com>
 References: <unique-message-id@example.com>
@@ -617,7 +617,7 @@ test_expect_success $PREREQ 'In-Reply-To without --chain-reply-to' '
 	sed -n -e "s/^In-Reply-To: *\(.*\)/\1/p" msgtxt1 >actual &&
 	test_cmp expect actual &&
 	# Second and subsequent messages are replies to the first one
-	sed -n -e "s/^Message-Id: *\(.*\)/\1/p" msgtxt1 >expect &&
+	sed -n -e "s/^Message-ID: *\(.*\)/\1/p" msgtxt1 >expect &&
 	sed -n -e "s/^In-Reply-To: *\(.*\)/\1/p" msgtxt2 >actual &&
 	test_cmp expect actual &&
 	sed -n -e "s/^In-Reply-To: *\(.*\)/\1/p" msgtxt3 >actual &&
@@ -637,10 +637,10 @@ test_expect_success $PREREQ 'In-Reply-To with --chain-reply-to' '
 		2>errors &&
 	sed -n -e "s/^In-Reply-To: *\(.*\)/\1/p" msgtxt1 >actual &&
 	test_cmp expect actual &&
-	sed -n -e "s/^Message-Id: *\(.*\)/\1/p" msgtxt1 >expect &&
+	sed -n -e "s/^Message-ID: *\(.*\)/\1/p" msgtxt1 >expect &&
 	sed -n -e "s/^In-Reply-To: *\(.*\)/\1/p" msgtxt2 >actual &&
 	test_cmp expect actual &&
-	sed -n -e "s/^Message-Id: *\(.*\)/\1/p" msgtxt2 >expect &&
+	sed -n -e "s/^Message-ID: *\(.*\)/\1/p" msgtxt2 >expect &&
 	sed -n -e "s/^In-Reply-To: *\(.*\)/\1/p" msgtxt3 >actual &&
 	test_cmp expect actual
 '
@@ -713,7 +713,7 @@ Cc: cc@example.com,
 	two@example.com
 Subject: [PATCH 1/1] Second.
 Date: DATE-STRING
-Message-Id: MESSAGE-ID-STRING
+Message-ID: MESSAGE-ID-STRING
 X-Mailer: X-MAILER-STRING
 MIME-Version: 1.0
 Content-Transfer-Encoding: 8bit
@@ -759,7 +759,7 @@ Cc: A <author@example.com>,
 	two@example.com
 Subject: [PATCH 1/1] Second.
 Date: DATE-STRING
-Message-Id: MESSAGE-ID-STRING
+Message-ID: MESSAGE-ID-STRING
 X-Mailer: X-MAILER-STRING
 MIME-Version: 1.0
 Content-Transfer-Encoding: 8bit
@@ -796,7 +796,7 @@ Cc: A <author@example.com>,
 	C O Mitter <committer@example.com>
 Subject: [PATCH 1/1] Second.
 Date: DATE-STRING
-Message-Id: MESSAGE-ID-STRING
+Message-ID: MESSAGE-ID-STRING
 X-Mailer: X-MAILER-STRING
 MIME-Version: 1.0
 Content-Transfer-Encoding: 8bit
@@ -824,7 +824,7 @@ From: Example <from@example.com>
 To: to@example.com
 Subject: [PATCH 1/1] Second.
 Date: DATE-STRING
-Message-Id: MESSAGE-ID-STRING
+Message-ID: MESSAGE-ID-STRING
 X-Mailer: X-MAILER-STRING
 MIME-Version: 1.0
 Content-Transfer-Encoding: 8bit
@@ -860,7 +860,7 @@ Cc: A <author@example.com>,
 	cc-cmd@example.com
 Subject: [PATCH 1/1] Second.
 Date: DATE-STRING
-Message-Id: MESSAGE-ID-STRING
+Message-ID: MESSAGE-ID-STRING
 X-Mailer: X-MAILER-STRING
 MIME-Version: 1.0
 Content-Transfer-Encoding: 8bit
@@ -893,7 +893,7 @@ Cc: A <author@example.com>,
 	two@example.com
 Subject: [PATCH 1/1] Second.
 Date: DATE-STRING
-Message-Id: MESSAGE-ID-STRING
+Message-ID: MESSAGE-ID-STRING
 X-Mailer: X-MAILER-STRING
 MIME-Version: 1.0
 Content-Transfer-Encoding: 8bit
@@ -926,7 +926,7 @@ Cc: A <author@example.com>,
 	two@example.com
 Subject: [PATCH 1/1] Second.
 Date: DATE-STRING
-Message-Id: MESSAGE-ID-STRING
+Message-ID: MESSAGE-ID-STRING
 X-Mailer: X-MAILER-STRING
 MIME-Version: 1.0
 Content-Transfer-Encoding: 8bit
@@ -963,7 +963,7 @@ Cc: A <author@example.com>,
 	C O Mitter <committer@example.com>
 Subject: [PATCH 1/1] Second.
 Date: DATE-STRING
-Message-Id: MESSAGE-ID-STRING
+Message-ID: MESSAGE-ID-STRING
 X-Mailer: X-MAILER-STRING
 MIME-Version: 1.0
 Content-Transfer-Encoding: 8bit
@@ -993,7 +993,7 @@ Cc: A <author@example.com>,
 	C O Mitter <committer@example.com>
 Subject: [PATCH 1/1] Second.
 Date: DATE-STRING
-Message-Id: MESSAGE-ID-STRING
+Message-ID: MESSAGE-ID-STRING
 X-Mailer: X-MAILER-STRING
 MIME-Version: 1.0
 Content-Transfer-Encoding: 8bit
@@ -1478,7 +1478,7 @@ test_expect_success $PREREQ 'To headers from files reset each patch' '
 test_expect_success $PREREQ 'setup expect' '
 cat >email-using-8bit <<\EOF
 From fe6ecc66ece37198fe5db91fa2fc41d9f4fe5cc4 Mon Sep 17 00:00:00 2001
-Message-Id: <bogus-message-id@example.com>
+Message-ID: <bogus-message-id@example.com>
 From: author@example.com
 Date: Sat, 12 Jun 2010 15:53:58 +0200
 Subject: subject goes here
@@ -1564,7 +1564,7 @@ test_expect_success $PREREQ '--8bit-encoding overrides sendemail.8bitEncoding' '
 test_expect_success $PREREQ 'setup expect' '
 	cat >email-using-8bit <<-\EOF
 	From fe6ecc66ece37198fe5db91fa2fc41d9f4fe5cc4 Mon Sep 17 00:00:00 2001
-	Message-Id: <bogus-message-id@example.com>
+	Message-ID: <bogus-message-id@example.com>
 	From: author@example.com
 	Date: Sat, 12 Jun 2010 15:53:58 +0200
 	Subject: Dieser Betreff enthält auch einen Umlaut!
@@ -1593,7 +1593,7 @@ test_expect_success $PREREQ '--8bit-encoding also treats subject' '
 test_expect_success $PREREQ 'setup expect' '
 	cat >email-using-8bit <<-\EOF
 	From fe6ecc66ece37198fe5db91fa2fc41d9f4fe5cc4 Mon Sep 17 00:00:00 2001
-	Message-Id: <bogus-message-id@example.com>
+	Message-ID: <bogus-message-id@example.com>
 	From: A U Thor <author@example.com>
 	Date: Sat, 12 Jun 2010 15:53:58 +0200
 	Content-Type: text/plain; charset=UTF-8
@@ -1674,7 +1674,7 @@ test_expect_success $PREREQ '8-bit and sendemail.transferencoding=base64' '
 test_expect_success $PREREQ 'setup expect' '
 	cat >email-using-qp <<-\EOF
 	From fe6ecc66ece37198fe5db91fa2fc41d9f4fe5cc4 Mon Sep 17 00:00:00 2001
-	Message-Id: <bogus-message-id@example.com>
+	Message-ID: <bogus-message-id@example.com>
 	From: A U Thor <author@example.com>
 	Date: Sat, 12 Jun 2010 15:53:58 +0200
 	MIME-Version: 1.0
@@ -1700,7 +1700,7 @@ test_expect_success $PREREQ 'convert from quoted-printable to base64' '
 test_expect_success $PREREQ 'setup expect' "
 tr -d '\\015' | tr '%' '\\015' >email-using-crlf <<EOF
 From fe6ecc66ece37198fe5db91fa2fc41d9f4fe5cc4 Mon Sep 17 00:00:00 2001
-Message-Id: <bogus-message-id@example.com>
+Message-ID: <bogus-message-id@example.com>
 From: A U Thor <author@example.com>
 Date: Sat, 12 Jun 2010 15:53:58 +0200
 Content-Type: text/plain; charset=UTF-8