diff --git a/README.md b/README.md
index 2c2bfbc..db0a438 100644
--- a/README.md
+++ b/README.md
@@ -156,7 +156,7 @@ cargo test send_sample_messages -- --ignored
 Alternatively you can send messages using curl:
 
 ```sh
-curl smtp://127.0.0.1:1025 --mail-from myself@example.com --mail-rcpt receiver@example.com --upload-file samples/normal.email --user 'user:pass'
+curl smtp://127.0.0.1:1025 --mail-from myself@example.com --mail-rcpt receiver@example.com --upload-file samples/normal.email
 # with tls
 curl -k --ssl-reqd smtps://127.0.0.1:1025 --mail-from myself@example.com --mail-rcpt receiver@example.com --upload-file samples/normal.email --user 'user:pass'
 ```
diff --git a/backend/src/smtp/handler.rs b/backend/src/smtp/handler.rs
index 3d8f63e..7fc3aa4 100644
--- a/backend/src/smtp/handler.rs
+++ b/backend/src/smtp/handler.rs
@@ -120,4 +120,8 @@ impl mailin::Handler for MailHandler {
     ) -> mailin::Response {
         mailin::response::AUTH_OK
     }
+
+    fn auth_login(&mut self, _username: &str, _password: &str) -> mailin::Response {
+        mailin::response::AUTH_OK
+    }
 }
diff --git a/backend/src/smtp/server.rs b/backend/src/smtp/server.rs
index 328bc78..a5bc629 100644
--- a/backend/src/smtp/server.rs
+++ b/backend/src/smtp/server.rs
@@ -67,6 +67,7 @@ impl MailServer {
 
     pub(super) fn with_authentication(mut self) -> Self {
         self.session_builder.enable_auth(AuthMechanism::Plain);
+        self.session_builder.enable_auth(AuthMechanism::Login);
 
         self
     }