1 files changed, 1 insertions, 1 deletions

diff --git a/user-profiles/feeds/imm-notmuch-insert.py b/user-profiles/feeds/imm-notmuch-insert.py
index 98a05c7e..2790abd0 100644
--- a/user-profiles/feeds/imm-notmuch-insert.py
+++ b/user-profiles/feeds/imm-notmuch-insert.py
@@ -20,7 +20,7 @@ def main():
     msg['From'] = f"{callbackMessage['feed_definition']['title']} ({authors}) <imm@imm.invalid>"
     msg['To'] = f"{notmuchConfig['user']['name']} <{notmuchConfig['user']['primary_email']}>"
     msg['Subject'] = callbackMessage['feed_item']['title']
-    msg['Message-ID'] = f"{callbackMessage['feed_item']['identifier']}@imm.invalid"
+    msg['Item-Identifier'] = f"{callbackMessage['feed_item']['identifier']}@imm.invalid"
     for link in callbackMessage['feed_item']['links']:
         msg.add_header('Link', link['uri'])
     if 'date' in callbackMessage['feed_item']: