diff --git a/codeforlife/mail.py b/codeforlife/mail.py
index 048edc09..0a0c0efa 100644
--- a/codeforlife/mail.py
+++ b/codeforlife/mail.py
@@ -5,11 +5,13 @@
 Dotdigital helpers.
 """
 
-import os
+import json
+import logging
 import typing as t
 from dataclasses import dataclass
 
 import requests
+from django.conf import settings
 
 from .types import JsonDict
 
@@ -72,7 +74,7 @@ def add_contact(
     # pylint: enable=line-too-long
 
     if auth is None:
-        auth = os.environ["DOTDIGITAL_AUTH"]
+        auth = settings.DOTDIGITAL_AUTH
 
     contact: JsonDict = {"email": email.lower()}
     if opt_in_type is not None:
@@ -123,6 +125,12 @@ def add_contact(
             for preference in preferences
         ]
 
+    if not settings.DOTDIGITAL_ENABLED:
+        logging.info(
+            "Added contact to DotDigital:\n%s", json.dumps(body, indent=2)
+        )
+        return
+
     response = requests.post(
         # pylint: disable-next=line-too-long
         url=f"https://{region}-api.dotdigital.com/v2/contacts/with-consent-and-preferences",
@@ -166,8 +174,12 @@ def remove_contact(
     """
     # pylint: enable=line-too-long
 
+    if not settings.DOTDIGITAL_ENABLED:
+        logging.info("Removed contact from DotDigital: %s", contact_identifier)
+        return
+
     if auth is None:
-        auth = os.environ["DOTDIGITAL_AUTH"]
+        auth = settings.DOTDIGITAL_AUTH
 
     response = requests.get(
         # pylint: disable-next=line-too-long
@@ -250,7 +262,7 @@ def send_mail(
     # pylint: enable=line-too-long
 
     if auth is None:
-        auth = os.environ["DOTDIGITAL_AUTH"]
+        auth = settings.DOTDIGITAL_AUTH
 
     body = {
         "campaignId": campaign_id,
@@ -282,6 +294,13 @@ def send_mail(
             for attachment in attachments
         ]
 
+    if not settings.DOTDIGITAL_ENABLED:
+        logging.info(
+            "Sent a triggered email with DotDigital:\n%s",
+            json.dumps(body, indent=2),
+        )
+        return
+
     response = requests.post(
         url=f"https://{region}-api.dotdigital.com/v2/email/triggered-campaign",
         json=body,
diff --git a/codeforlife/settings/custom.py b/codeforlife/settings/custom.py
index 7a788013..3ebefa1e 100644
--- a/codeforlife/settings/custom.py
+++ b/codeforlife/settings/custom.py
@@ -22,3 +22,10 @@
 
 # The api url of the current service.
 SERVICE_API_URL = f"{SERVICE_BASE_URL}/api"
+
+# The authorization bearer token used to authenticate with Dotdigital.
+DOTDIGITAL_AUTH = os.getenv("DOTDIGITAL_AUTH", "REPLACE_ME")
+
+# A global flag used to enabled/disable calls to Dotdigital's API.
+# If disabled, API calls will be logged to the console instead.
+DOTDIGITAL_ENABLED = bool(int(os.getenv("DOTDIGITAL_ENABLED", "0")))