diff --git a/README.md b/README.md
index d93bda3a..a1cb4379 100644
--- a/README.md
+++ b/README.md
@@ -405,9 +405,6 @@ DISABLE_ALIAS_SUFFIX=1
 # the DKIM private key used to compute DKIM-Signature
 DKIM_PRIVATE_KEY_PATH=/dkim.key
 
-# the DKIM public key used to setup custom domain DKIM
-DKIM_PUBLIC_KEY_PATH=/dkim.pub.key
-
 # DB Connection
 DB_URI=postgresql://myuser:mypassword@sl-db:5432/simplelogin
 
diff --git a/app/config.py b/app/config.py
index 7206917e..f63a04a9 100644
--- a/app/config.py
+++ b/app/config.py
@@ -148,20 +148,11 @@ DISABLE_ALIAS_SUFFIX = "DISABLE_ALIAS_SUFFIX" in os.environ
 UNSUBSCRIBER = os.environ.get("UNSUBSCRIBER")
 
 DKIM_PRIVATE_KEY_PATH = get_abs_path(os.environ["DKIM_PRIVATE_KEY_PATH"])
-DKIM_PUBLIC_KEY_PATH = get_abs_path(os.environ["DKIM_PUBLIC_KEY_PATH"])
 DKIM_SELECTOR = b"dkim"
 
 with open(DKIM_PRIVATE_KEY_PATH) as f:
     DKIM_PRIVATE_KEY = f.read()
 
-with open(DKIM_PUBLIC_KEY_PATH) as f:
-    DKIM_DNS_VALUE = (
-        f.read()
-        .replace("-----BEGIN PUBLIC KEY-----", "")
-        .replace("-----END PUBLIC KEY-----", "")
-        .replace("\r", "")
-        .replace("\n", "")
-    )
 
 DKIM_HEADERS = [b"from", b"to"]
 
diff --git a/example.env b/example.env
index 971313e2..b269b90f 100644
--- a/example.env
+++ b/example.env
@@ -72,10 +72,6 @@ EMAIL_SERVERS_WITH_PRIORITY=[(10, "email.hostname.")]
 # the DKIM private key used to compute DKIM-Signature
 DKIM_PRIVATE_KEY_PATH=local_data/dkim.key
 
-# the DKIM public key used to setup custom domain DKIM
-DKIM_PUBLIC_KEY_PATH=local_data/dkim.pub.key
-
-
 # delete and recreate the sqlite database, for local development
 RESET_DB=true
 
diff --git a/tests/test.env b/tests/test.env
index 4e29de24..f0f8191a 100644
--- a/tests/test.env
+++ b/tests/test.env
@@ -13,7 +13,6 @@ ADMIN_EMAIL=to_fill
 MAX_NB_EMAIL_FREE_PLAN=3
 EMAIL_SERVERS_WITH_PRIORITY=[(10, "email.hostname.")]
 DKIM_PRIVATE_KEY_PATH=local_data/dkim.key
-DKIM_PUBLIC_KEY_PATH=local_data/dkim.pub.key
 
 # Database
 RESET_DB=true