1 files changed, 17 insertions, 1 deletions
diff --git a/distixlib/msg_id_extractor.py b/distixlib/msg_id_extractor.py
index cbe985d..d789e90 100644
--- a/distixlib/msg_id_extractor.py
+++ b/distixlib/msg_id_extractor.py
@@ -16,6 +16,22 @@
 # =*= License: GPL-3+ =*=
 
 
+import email
+
 
 def get_ids_from_message(msg):
-    return []
+    return set(_yield_ids(msg))
+
+
+def _yield_ids(msg):
+    header_names = ('Message-Id', 'In-Reply-To', 'References')
+    for header_name in header_names:
+        for msg_id in _yield_ids_from_header(msg, header_name):
+            yield msg_id
+
+
+def _yield_ids_from_header(msg, header_name):
+    values = msg.get_all(header_name)
+    if values:
+        for _, msg_id in email.utils.getaddresses(values):
+            yield msg_id