Add a return address for bounced emails

Author: maxious

dmutils/email.py

@@ -53,7 +53,8 @@ def send_email(to_email_addresses, email_body, subject, from_email, from_name, r
             }
             if 'DM_EMAIL_BCC_ADDRESS' in current_app.config:
                 destination_addresses['BccAddresses'] = [current_app.config['DM_EMAIL_BCC_ADDRESS']]
-
+            if 'DM_EMAIL_RETURN_ADDRESS' in current_app.config:
+                return_address = current_app.config['DM_EMAIL_RETURN_ADDRESS']
             result = email_client.send_email(
                 Source=u"{} <{}>".format(from_name, from_email),
                 Destination=destination_addresses,
@@ -69,6 +70,7 @@ def send_email(to_email_addresses, email_body, subject, from_email, from_name, r
                         }
                     }
                 },
+                ReturnPath=return_address or reply_to or from_email,
                 ReplyToAddresses=[reply_to or from_email],
             )
         except botocore.exceptions.ClientError as e:

tests/test_email.py

@@ -16,6 +16,7 @@
 
 TEST_SECRET_KEY = 'TestKeyTestKeyTestKeyTestKeyTestKeyTestKeyX='
 TEST_ARCHIVE_ADDRESS = '[email protected]'
+TEST_RETURN_ADDRESS = '[email protected]'
 
 
 @pytest.yield_fixture
@@ -33,6 +34,7 @@ def email_app(app):
     app.config['SECRET_KEY'] = TEST_SECRET_KEY
     app.config['RESET_PASSWORD_SALT'] = 'PassSalt'
     app.config['DM_EMAIL_BCC_ADDRESS'] = TEST_ARCHIVE_ADDRESS
+    app.config['DM_EMAIL_RETURN_ADDRESS'] = TEST_RETURN_ADDRESS
     yield app
 
 
@@ -51,7 +53,8 @@ def test_calls_send_email_with_correct_params(email_app, email_client):
         Message={'Body': {'Html': {'Charset': 'UTF-8', 'Data': 'body'}},
                  'Subject': {'Charset': 'UTF-8', 'Data': 'subject'}},
         Destination={'ToAddresses': ['email_address'], 'BccAddresses': [TEST_ARCHIVE_ADDRESS]},
-        Source=u'from_name <from_email>'
+        Source=u'from_name <from_email>',
+        ReturnPath=TEST_RETURN_ADDRESS
     )
 
 
@@ -87,7 +90,8 @@ def test_calls_send_email_with_alternative_reply_to(email_app, email_client):
         Message={'Body': {'Html': {'Charset': 'UTF-8', 'Data': 'body'}},
                  'Subject': {'Charset': 'UTF-8', 'Data': 'subject'}},
         Destination={'ToAddresses': ['email_address'], 'BccAddresses': [TEST_ARCHIVE_ADDRESS]},
-        Source=u'from_name <from_email>'
+        Source=u'from_name <from_email>',
+        ReturnPath=TEST_RETURN_ADDRESS
     )