1 files changed, 10 insertions, 0 deletions

diff --git a/src/mailman_pgp/pgp/utils.py b/src/mailman_pgp/pgp/utils.py
index cc0bda0..0946e3f 100644
--- a/src/mailman_pgp/pgp/utils.py
+++ b/src/mailman_pgp/pgp/utils.py
@@ -15,8 +15,18 @@
 # You should have received a copy of the GNU General Public License along with
 # this program.  If not, see <http://www.gnu.org/licenses/>.
 
+"""Various pgp and email utilities."""
+
 
 def copy_headers(from_msg, to_msg):
+    """
+    Copy the headers and unixfrom from a message to another one.
+
+    :param from_msg: The source `Message`.
+    :type from_msg: email.message.Message
+    :param to_msg: The destination `Message`.
+    :type to_msg: email.message.Message
+    """
     for key, value in from_msg.items():
         if key not in to_msg:
             to_msg[key] = value