diff --git a/lib/nntp/tiny/mbox.py b/lib/nntp/tiny/mbox.py
index a4cdf62..99a2d8a 100644
--- a/lib/nntp/tiny/mbox.py
+++ b/lib/nntp/tiny/mbox.py
@@ -1,5 +1,6 @@
 import re
 import enum
+import dateparser
 
 class MBoxReaderError(Exception):
     pass
@@ -87,7 +88,7 @@ class MBoxMessage():
                 match = re.match('^([^:]+): (.*)$', line)
 
                 if match:
-                    self.key = match[1]
+                    self.key = match[1].lower()
 
                     self.headers[self.key] = match[2].rstrip()
         elif self.state is MBoxMessageState.BODY:
@@ -98,6 +99,12 @@ class MBoxMessage():
 
         self.line = line
 
+    def header(self, key: str):
+        return self.headers[key.lower()]
+
+    def date(self):
+        return dateparser.parse(self.headers['date'])
+
     def is_first_line(self):
         return len(self.headers) == 1 and (self.body == '' or self.body is None)