diff --git a/src/mimefactory.rs b/src/mimefactory.rs
index 6c9eaf6df..b6308812e 100644
--- a/src/mimefactory.rs
+++ b/src/mimefactory.rs
@@ -2238,11 +2238,10 @@ impl MimeFactory {
 
         // second body part: machine-readable, always REQUIRED by RFC 6522
         let message_text2 = format!(
-            "Original-Recipient: rfc822;{}\r\n\
-             Final-Recipient: rfc822;{}\r\n\
+            "Final-Recipient: rfc822;{}\r\n\
              Original-Message-ID: <{}>\r\n\
              Disposition: manual-action/MDN-sent-automatically; displayed\r\n",
-            self.from_addr, self.from_addr, rfc724_mid
+            self.from_addr, rfc724_mid
         );
 
         let extension_fields = if additional_msg_ids.is_empty() {
@@ -2527,8 +2526,7 @@ fn keyupdate_body(from_addr: &str) -> MimePart<'static> {
     message.add_part(MimePart::new(
         "message/disposition-notification",
         format!(
-            "Original-Recipient: rfc822;{from_addr}\r\n\
-             Final-Recipient: rfc822;{from_addr}\r\n\
+            "Final-Recipient: rfc822;{from_addr}\r\n\
              Disposition: automatic-action/MDN-sent-automatically; processed\r\n"
         ),
     ));
diff --git a/src/mimefactory/mimefactory_tests.rs b/src/mimefactory/mimefactory_tests.rs
index 885ab4d40..b59d872b9 100644
--- a/src/mimefactory/mimefactory_tests.rs
+++ b/src/mimefactory/mimefactory_tests.rs
@@ -269,8 +269,6 @@ async fn test_subject_mdn() {
           --SNIPP\r\n\
           Content-Type: message/disposition-notification\r\n\
           \r\n\
-          Reporting-UA: Delta Chat 1.28.0\r\n\
-          Original-Recipient: rfc822;bob@example.com\r\n\
           Final-Recipient: rfc822;bob@example.com\r\n\
           Original-Message-ID: <2893@example.com>\r\n\
           Disposition: manual-action/MDN-sent-automatically; displayed\r\n\
diff --git a/src/mimeparser/mimeparser_tests.rs b/src/mimeparser/mimeparser_tests.rs
index e542c1037..96fd58b7b 100644
--- a/src/mimeparser/mimeparser_tests.rs
+++ b/src/mimeparser/mimeparser_tests.rs
@@ -570,8 +570,6 @@ This is no guarantee the content was read.\n\
 --kJBbU58X1xeWNHgBtTbMk80M5qnV4N\n\
 Content-Type: message/disposition-notification\n\
 \n\
-Reporting-UA: Delta Chat 1.0.0-beta.22\n\
-Original-Recipient: rfc822;bob@example.org\n\
 Final-Recipient: rfc822;bob@example.org\n\
 Original-Message-ID: <foo@example.org>\n\
 Disposition: manual-action/MDN-sent-automatically; displayed\n\
@@ -626,8 +624,6 @@ This is no guarantee the content was read.\n\
 --kJBbU58X1xeWNHgBtTbMk80M5qnV4N\n\
 Content-Type: message/disposition-notification\n\
 \n\
-Reporting-UA: Delta Chat 1.0.0-beta.22\n\
-Original-Recipient: rfc822;bob@example.org\n\
 Final-Recipient: rfc822;bob@example.org\n\
 Original-Message-ID: <bar@example.org>\n\
 Disposition: manual-action/MDN-sent-automatically; displayed\n\
@@ -650,8 +646,6 @@ This is no guarantee the content was read.\n\
 --zuOJlsTfZAukyawEPVdIgqWjaM9w2W\n\
 Content-Type: message/disposition-notification\n\
 \n\
-Reporting-UA: Delta Chat 1.0.0-beta.22\n\
-Original-Recipient: rfc822;bob@example.org\n\
 Final-Recipient: rfc822;bob@example.org\n\
 Original-Message-ID: <baz@example.org>\n\
 Disposition: manual-action/MDN-sent-automatically; displayed\n\
@@ -697,8 +691,6 @@ This is no guarantee the content was read.\n\
 --kJBbU58X1xeWNHgBtTbMk80M5qnV4N\n\
 Content-Type: message/disposition-notification\n\
 \n\
-Reporting-UA: Delta Chat 1.0.0-beta.22\n\
-Original-Recipient: rfc822;bob@example.org\n\
 Final-Recipient: rfc822;bob@example.org\n\
 Original-Message-ID: <foo@example.org>\n\
 Disposition: manual-action/MDN-sent-automatically; displayed\n\
@@ -1574,7 +1566,6 @@ async fn test_ignore_read_receipt_to_self() -> Result<()> {
                  --SNIPP\r\n\
                  Content-Type: message/disposition-notification\r\n\
                  \r\n\
-                 Original-Recipient: rfc822;bob@example.com\r\n\
                  Final-Recipient: rfc822;bob@example.com\r\n\
                  Original-Message-ID: <first@example.com>\r\n\
                  Disposition: manual-action/MDN-sent-automatically; displayed\r\n\
diff --git a/src/receive_imf/receive_imf_tests.rs b/src/receive_imf/receive_imf_tests.rs
index 1c6ad18dd..1c5c9eca6 100644
--- a/src/receive_imf/receive_imf_tests.rs
+++ b/src/receive_imf/receive_imf_tests.rs
@@ -251,8 +251,6 @@ async fn test_mdn_and_alias() -> Result<()> {
              --SNIPP\n\
              Content-Type: message/disposition-notification\n\
              \n\
-             Reporting-UA: Delta Chat 1.28.0\n\
-             Original-Recipient: rfc822;bob@example.com\n\
              Final-Recipient: rfc822;bob@example.com\n\
              Original-Message-ID: <{msg_id}>\n\
              Disposition: manual-action/MDN-sent-automatically; displayed\n\
diff --git a/test-data/message/mdn_without_message_reference.eml b/test-data/message/mdn_without_message_reference.eml
index 14591ec95..d9e40809d 100644
--- a/test-data/message/mdn_without_message_reference.eml
+++ b/test-data/message/mdn_without_message_reference.eml
@@ -15,7 +15,6 @@ Read receipts do not guarantee sth. was read.
 --SNIPP
 Content-Type: message/disposition-notification
 
-Original-Recipient: rfc822;bob@example.net
 Final-Recipient: rfc822;bob@example.net
 Disposition: automatic-action/MDN-sent-automatically; processed