diff --git a/skywipe/configure.py b/skywipe/configure.py
index df2cdce..72a1734 100644
--- a/skywipe/configure.py
+++ b/skywipe/configure.py
@@ -1,11 +1,48 @@
 """Core configuration module for Skywipe"""
 
 import getpass
+import re
 from pathlib import Path
 import yaml
 from .logger import setup_logger
 
 
+def _validate_handle(handle: str) -> tuple[bool, str]:
+    if not handle:
+        return False, "Handle cannot be empty"
+
+    if len(handle) > 253:
+        return False, "Handle is too long (max 253 characters)"
+
+    if " " in handle:
+        return False, "Handle cannot contain spaces"
+
+    handle_pattern = re.compile(
+        r"^([a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?\.)+[a-zA-Z]{2,}$|"
+        r"^[a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?$|"
+        r"^did:[a-z]+:[a-zA-Z0-9._-]+$"
+    )
+
+    if not handle_pattern.match(handle):
+        return False, (
+            "Invalid handle format. "
+            "Use a username (e.g., 'alice'), full handle (e.g., 'alice.bsky.social'), "
+            "or DID (e.g., 'did:plc:...')"
+        )
+
+    return True, ""
+
+
+def _validate_password(password: str) -> tuple[bool, str]:
+    if not password:
+        return False, "Password cannot be empty"
+
+    if len(password) < 8:
+        return False, "Password is too short (minimum 8 characters)"
+
+    return True, ""
+
+
 class Configuration:
     def __init__(self):
         self.config_file = Path.home() / ".config" / "skywipe" / "config.yml"
@@ -27,8 +64,27 @@ class Configuration:
 
         print("Skywipe Configuration")
         print("=" * 50)
-        handle = input("Bluesky handle: ").strip()
-        password = getpass.getpass("Bluesky app password: ").strip()
+        print("Note: You should use an app password from Bluesky settings.")
+
+        while True:
+            handle = input("Bluesky handle: ").strip()
+            is_valid, error_msg = _validate_handle(handle)
+            if is_valid:
+                break
+            logger.error(error_msg)
+            logger.info("Please enter a valid handle and try again.")
+
+        while True:
+            password = getpass.getpass(
+                "Bluesky (hopefully app) password: ").strip()
+            is_valid, error_msg = _validate_password(password)
+            if is_valid:
+                break
+            logger.error(error_msg)
+            logger.info("Please check your password and try again.")
+            logger.info(
+                "Generate an app password at: https://bsky.app/settings/app-passwords")
+
         batch_size = input("Batch size (default: 10): ").strip() or "10"
         delay = input(
             "Delay between batches in seconds (default: 1): ").strip() or "1"
@@ -38,9 +94,20 @@ class Configuration:
 
         try:
             batch_size = int(batch_size)
-            delay = int(delay)
+            if batch_size < 1 or batch_size > 100:
+                logger.error("batch_size must be between 1 and 100")
+                return
         except ValueError:
-            logger.error("batch_size and delay must be integers")
+            logger.error("batch_size must be an integer")
+            return
+
+        try:
+            delay = int(delay)
+            if delay < 0 or delay > 60:
+                logger.error("delay must be between 0 and 60 seconds")
+                return
+        except ValueError:
+            logger.error("delay must be an integer")
             return
 
         config_data = {