diff --git a/app/email/headers.py b/app/email/headers.py
index 3b5be9e8..e1aaabd6 100644
--- a/app/email/headers.py
+++ b/app/email/headers.py
@@ -2,7 +2,7 @@
 MESSAGE_ID = "Message-ID"
 IN_REPLY_TO = "In-Reply-To"
 REFERENCES = "References"
-DATE = "date"
+DATE = "Date"
 SUBJECT = "Subject"
 FROM = "From"
 TO = "To"