diff --git a/.editorconfig b/.editorconfig
index af01f73..6aee114 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -9,3 +9,7 @@ indent_style = space
 insert_final_newline = true
 max_line_length = 80
 trim_trailing_whitespace = true
+
+[*.rs]
+indent_size = 4
+tab_width = 4
diff --git a/src/config.rs b/src/config.rs
index 3c281a9..779e0a9 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -1,4 +1,4 @@
-use {super::error, serde::Deserialize};
+use {super::error, serde::Deserialize, std::str::FromStr};
 
 const DEFAULT_PORT_NUMBER: u16 = 3001;
 const DEFAULT_LOG_LEVEL: &str = "WARN";
@@ -39,6 +39,10 @@ impl Configuration {
     pub fn is_valid(&self) -> error::Result<()> {
         Ok(())
     }
+
+    pub fn log_level(&self) -> tracing::Level {
+        tracing::Level::from_str(self.log_level.as_str()).unwrap_or(tracing::Level::INFO)
+    }
 }
 
 fn default_port() -> u16 {
diff --git a/src/handlers/save_message.rs b/src/handlers/save_message.rs
index e57c1f6..9bb1c67 100644
--- a/src/handlers/save_message.rs
+++ b/src/handlers/save_message.rs
@@ -27,8 +27,7 @@ pub struct HistoryPayload {
 
 pub async fn handler(
     StateExtractor(state): StateExtractor<Arc<AppState>>,
-    // RequireValidSignature(Json(payload)): RequireValidSignature<Json<HistoryPayload>>,
-    Json(payload): Json<HistoryPayload>,
+    RequireValidSignature(Json(payload)): RequireValidSignature<Json<HistoryPayload>>,
 ) -> error::Result<Response> {
     debug!("Received `save_message` query: {:?}", payload);
 
diff --git a/src/lib.rs b/src/lib.rs
index d9d2fdf..181cb9c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -19,7 +19,6 @@ use {
         cors::{AllowOrigin, CorsLayer},
         trace::{DefaultMakeSpan, DefaultOnRequest, DefaultOnResponse, TraceLayer},
     },
-    tracing::Level,
 };
 
 pub mod auth;
@@ -101,10 +100,10 @@ pub async fn bootstrap(
         .layer(
             TraceLayer::new_for_http()
                 .make_span_with(DefaultMakeSpan::new().include_headers(true))
-                .on_request(DefaultOnRequest::new().level(Level::INFO))
+                .on_request(DefaultOnRequest::new().level(config.log_level()))
                 .on_response(
                     DefaultOnResponse::new()
-                        .level(Level::INFO)
+                        .level(config.log_level())
                         .include_headers(true),
                 ),
         )
diff --git a/src/relay/signature.rs b/src/relay/signature.rs
index 07442c7..bca899a 100644
--- a/src/relay/signature.rs
+++ b/src/relay/signature.rs
@@ -7,6 +7,7 @@ use {
             MissingTimestampHeader,
             ToBytesError,
         },
+        log::prelude::*,
         state::State,
     },
     async_trait::async_trait,
@@ -63,14 +64,20 @@ where
             .and_then(|header| header.to_str().ok());
 
         match (signature_header, timestamp_header) {
-            (Some(signature), Some(timestamp))
-                if signature_is_valid(signature, timestamp, &body, &public_key).await? =>
-            {
-                let req = Request::<B>::from_parts(parts, bytes.into());
-                Ok(T::from_request(req, state)
-                    .await
-                    .map(Self)
-                    .map_err(|_| FromRequestError)?)
+            (Some(signature), Some(timestamp)) => {
+                match signature_is_valid(signature, timestamp, &body, &public_key).await {
+                    Ok(_) => {
+                        let req = Request::<B>::from_parts(parts, bytes.into());
+                        Ok(T::from_request(req, state)
+                            .await
+                            .map(Self)
+                            .map_err(|_| FromRequestError)?)
+                    }
+                    Err(err) => {
+                        warn!("relay signature is not valid: {err:?}");
+                        Err(err)
+                    }
+                }
             }
             (Some(_), None) => Err(MissingTimestampHeader),
             (None, Some(_)) => Err(MissingSignatureHeader),
diff --git a/terraform/main.tf b/terraform/main.tf
index 7be76f4..90374dc 100644
--- a/terraform/main.tf
+++ b/terraform/main.tf
@@ -89,8 +89,6 @@ module "ecs" {
   allowed_app_ingress_cidr_blocks = module.vpc.vpc_cidr_block
   allowed_lb_ingress_cidr_blocks  = module.vpc.vpc_cidr_block
   docdb-connection_url            = module.history_docdb.connection_url
-
-  log_level = "DEBUG"
 }
 
 ################################################################################