diff --git a/apps/browser-extension/src/entrypoints/popup/components/EmailPreview.tsx b/apps/browser-extension/src/entrypoints/popup/components/EmailPreview.tsx
index 9eaadf637..75934940b 100644
--- a/apps/browser-extension/src/entrypoints/popup/components/EmailPreview.tsx
+++ b/apps/browser-extension/src/entrypoints/popup/components/EmailPreview.tsx
@@ -156,14 +156,30 @@ export const EmailPreview: React.FC<EmailPreviewProps> = ({ email }) => {
                   }
                   return prevEmails;
                 });
+
+                // Clear any previous error on successful load
+                setError(null);
               }
             } catch {
               // Try to parse as error response instead
               const apiErrorResponse = response as ApiErrorResponse;
+
+              // Suppress errors while vault has unsynced changes (e.g., after item creation)
+              // The server may not know about newly created items/aliases yet
+              if (dbContext.shouldSuppressEmailErrors()) {
+                // Don't set error, keep loading state - will retry on next interval
+                return;
+              }
+
               setError(t('emails.apiErrors.' + apiErrorResponse?.code));
               return;
             }
           } catch {
+            // Suppress errors while vault has unsynced changes
+            if (dbContext.shouldSuppressEmailErrors()) {
+              return;
+            }
+
             setError(t('common.errors.unknownError'));
             return;
           }
diff --git a/apps/browser-extension/src/entrypoints/popup/context/DbContext.tsx b/apps/browser-extension/src/entrypoints/popup/context/DbContext.tsx
index 816fe947d..062d90474 100644
--- a/apps/browser-extension/src/entrypoints/popup/context/DbContext.tsx
+++ b/apps/browser-extension/src/entrypoints/popup/context/DbContext.tsx
@@ -44,6 +44,12 @@ type DbContextType = {
    * Set the syncing state.
    */
   setIsSyncing: (syncing: boolean) => void;
+  /**
+   * Check if email errors should be suppressed.
+   * Errors are suppressed when vault has local changes not yet synced,
+   * as the server may not know about newly created items/aliases yet.
+   */
+  shouldSuppressEmailErrors: () => boolean;
   /**
    * Load a decrypted vault into memory (SQLite client).
    */
@@ -107,6 +113,15 @@ export const DbProvider: React.FC<{ children: React.ReactNode }> = ({ children }
    */
   const [serverRevision, setServerRevision] = useState(0);
 
+  /**
+   * Check if email errors should be suppressed.
+   * Errors are suppressed when vault has local changes not yet synced,
+   * as the server may not know about newly created items/aliases yet.
+   */
+  const shouldSuppressEmailErrors = useCallback(() => {
+    return isDirty || isSyncing;
+  }, [isDirty, isSyncing]);
+
   /**
    * Set the offline mode state and persist it to local storage.
    * Updates both ref (sync) and state (triggers re-render).
@@ -277,6 +292,7 @@ export const DbProvider: React.FC<{ children: React.ReactNode }> = ({ children }
     serverRevision,
     setIsOffline,
     setIsSyncing,
+    shouldSuppressEmailErrors,
     loadDatabase,
     loadStoredDatabase,
     storeEncryptionKey,
@@ -285,7 +301,7 @@ export const DbProvider: React.FC<{ children: React.ReactNode }> = ({ children }
     getVaultMetadata,
     refreshSyncState,
     hasPendingMigrations,
-  }), [sqliteClient, dbInitialized, dbAvailable, isOffline, getIsOffline, isDirty, isSyncing, serverRevision, setIsOffline, loadDatabase, loadStoredDatabase, storeEncryptionKey, storeEncryptionKeyDerivationParams, clearDatabase, getVaultMetadata, refreshSyncState, hasPendingMigrations]);
+  }), [sqliteClient, dbInitialized, dbAvailable, isOffline, getIsOffline, isDirty, isSyncing, serverRevision, setIsOffline, shouldSuppressEmailErrors, loadDatabase, loadStoredDatabase, storeEncryptionKey, storeEncryptionKeyDerivationParams, clearDatabase, getVaultMetadata, refreshSyncState, hasPendingMigrations]);
 
   return (
     <DbContext.Provider value={contextValue}>
diff --git a/apps/mobile-app/components/items/details/EmailPreview.tsx b/apps/mobile-app/components/items/details/EmailPreview.tsx
index 25881ef5e..4d188d298 100644
--- a/apps/mobile-app/components/items/details/EmailPreview.tsx
+++ b/apps/mobile-app/components/items/details/EmailPreview.tsx
@@ -204,10 +204,23 @@ export const EmailPreview: React.FC<EmailPreviewProps> = ({ email }) : React.Rea
             } catch {
               // Try to parse as error response instead
               const apiErrorResponse = response as ApiErrorResponse;
+
+              // Suppress errors while vault has unsynced changes (e.g., after item creation)
+              // The server may not know about newly created items/aliases yet
+              if (dbContext.shouldSuppressEmailErrors()) {
+                // Don't set error, keep loading state - will retry on next interval
+                return;
+              }
+
               setError(t(`apiErrors.${apiErrorResponse?.code}`));
               return;
             }
           } catch {
+            // Suppress errors while vault has unsynced changes
+            if (dbContext.shouldSuppressEmailErrors()) {
+              return;
+            }
+
             setError(t('items.emailLoadError'));
           }
         }
diff --git a/apps/mobile-app/context/DbContext.tsx b/apps/mobile-app/context/DbContext.tsx
index 08259df40..8e81a958e 100644
--- a/apps/mobile-app/context/DbContext.tsx
+++ b/apps/mobile-app/context/DbContext.tsx
@@ -15,6 +15,12 @@ type DbContextType = {
   isOffline: boolean;
   setIsSyncing: (syncing: boolean) => void;
   setIsOffline: (offline: boolean) => Promise<void>;
+  /**
+   * Check if email errors should be suppressed.
+   * Errors are suppressed when vault has local changes not yet synced,
+   * as the server may not know about newly created items/aliases yet.
+   */
+  shouldSuppressEmailErrors: () => boolean;
   refreshSyncState: () => Promise<void>;
   storeEncryptionKey: (derivedKey: string) => Promise<void>;
   storeEncryptionKeyDerivationParams: (keyDerivationParams: EncryptionKeyDerivationParams) => Promise<void>;
@@ -63,6 +69,15 @@ export const DbProvider: React.FC<{ children: React.ReactNode }> = ({ children }
    */
   const [isOffline, setIsOfflineState] = useState(false);
 
+  /**
+   * Check if email errors should be suppressed.
+   * Errors are suppressed when vault has local changes not yet synced,
+   * as the server may not know about newly created items/aliases yet.
+   */
+  const shouldSuppressEmailErrors = useCallback(() => {
+    return isDirty || isSyncing;
+  }, [isDirty, isSyncing]);
+
   /**
    * Unlock the vault in the native module which will decrypt the database using the stored encryption key
    * and load it into memory.
@@ -246,6 +261,7 @@ export const DbProvider: React.FC<{ children: React.ReactNode }> = ({ children }
     isOffline,
     setIsSyncing,
     setIsOffline,
+    shouldSuppressEmailErrors,
     refreshSyncState,
     hasPendingMigrations,
     clearDatabase,
@@ -256,7 +272,7 @@ export const DbProvider: React.FC<{ children: React.ReactNode }> = ({ children }
     storeEncryptionKeyDerivationParams,
     checkStoredVault,
     setDatabaseAvailable,
-  }), [sqliteClient, dbInitialized, dbAvailable, isDirty, isSyncing, isOffline, setIsSyncing, setIsOffline, refreshSyncState, hasPendingMigrations, clearDatabase, getVaultMetadata, testDatabaseConnection, unlockVault, storeEncryptionKey, storeEncryptionKeyDerivationParams, checkStoredVault, setDatabaseAvailable]);
+  }), [sqliteClient, dbInitialized, dbAvailable, isDirty, isSyncing, isOffline, setIsSyncing, setIsOffline, shouldSuppressEmailErrors, refreshSyncState, hasPendingMigrations, clearDatabase, getVaultMetadata, testDatabaseConnection, unlockVault, storeEncryptionKey, storeEncryptionKeyDerivationParams, checkStoredVault, setDatabaseAvailable]);
 
   return (
     <DbContext.Provider value={contextValue}>
diff --git a/apps/server/AliasVault.Api/Controllers/VaultController.cs b/apps/server/AliasVault.Api/Controllers/VaultController.cs
index 1941ba0cc..9899b1eb3 100644
--- a/apps/server/AliasVault.Api/Controllers/VaultController.cs
+++ b/apps/server/AliasVault.Api/Controllers/VaultController.cs
@@ -141,6 +141,9 @@ public class VaultController(ILogger<VaultController> logger, IAliasServerDbCont
             return Unauthorized();
         }
 
+        // Simulate a delay to test the email error suppression logic.
+        await Task.Delay(10000);
+
         // Compare the logged-in username with the username in the provided vault model.
         // If they do not match reject the request. This is important because it's
         // possible that a user has logged in with a different username than the one