diff --git a/email_server/__init__.py b/email_server/__init__.py
new file mode 100644
index 0000000..2322bab
--- /dev/null
+++ b/email_server/__init__.py
@@ -0,0 +1,9 @@
+from .auth import *
+from .dkim_manager import *
+from .server_runner import *
+from .tls_utils import *
+from .cli_tools import *
+from .email_relay import *
+from .models import *
+from .smtp_handler import *
+from .config import *
\ No newline at end of file
diff --git a/email_server/auth.py b/email_server/auth.py
index f4e48b0..67b713c 100644
--- a/email_server/auth.py
+++ b/email_server/auth.py
@@ -5,7 +5,7 @@ Authentication modules for the SMTP server.
 import logging
 from datetime import datetime
 from aiosmtpd.smtp import AuthResult, LoginPassword
-from models import Session, User, Domain, WhitelistedIP, AuthLog, check_password
+from .models import Session, User, Domain, WhitelistedIP, AuthLog, check_password
 
 logger = logging.getLogger(__name__)
 
diff --git a/email_server/cli_tools.py b/email_server/cli_tools.py
index b23dbba..04c0807 100644
--- a/email_server/cli_tools.py
+++ b/email_server/cli_tools.py
@@ -4,8 +4,8 @@ Command-line tools for managing the SMTP server.
 
 import argparse
 import sys
-from models import Session, Domain, User, WhitelistedIP, hash_password, create_tables
-from dkim_manager import DKIMManager
+from .models import Session, Domain, User, WhitelistedIP, hash_password, create_tables
+from .dkim_manager import DKIMManager
 import logging
 
 logging.basicConfig(level=logging.INFO)
diff --git a/email_server/dkim_manager.py b/email_server/dkim_manager.py
index 8e58fec..cdd08f8 100644
--- a/email_server/dkim_manager.py
+++ b/email_server/dkim_manager.py
@@ -7,8 +7,8 @@ import dkim
 from cryptography.hazmat.primitives import serialization, hashes
 from cryptography.hazmat.primitives.asymmetric import rsa
 from datetime import datetime
-from models import Session, Domain, DKIMKey
-from config import DKIM_SELECTOR, DKIM_KEY_SIZE
+from .models import Session, Domain, DKIMKey
+from .config import DKIM_SELECTOR, DKIM_KEY_SIZE
 
 logger = logging.getLogger(__name__)
 
diff --git a/email_server/email_relay.py b/email_server/email_relay.py
index fa953d5..ceedaca 100644
--- a/email_server/email_relay.py
+++ b/email_server/email_relay.py
@@ -6,7 +6,7 @@ import dns.resolver
 import smtplib
 import logging
 from datetime import datetime
-from models import Session, EmailLog
+from .models import Session, EmailLog
 
 logger = logging.getLogger(__name__)
 
diff --git a/email_server/models.py b/email_server/models.py
index 1beee52..0141595 100644
--- a/email_server/models.py
+++ b/email_server/models.py
@@ -6,7 +6,7 @@ from sqlalchemy import create_engine, Column, Integer, String, DateTime, Text, B
 from sqlalchemy.orm import declarative_base, sessionmaker
 from datetime import datetime
 import bcrypt
-from config import DATABASE_URL
+from .config import DATABASE_URL
 
 # SQLAlchemy setup
 Base = declarative_base()
diff --git a/email_server/main.py b/email_server/server_runner.py
similarity index 92%
rename from email_server/main.py
rename to email_server/server_runner.py
index b92f65d..226de36 100644
--- a/email_server/main.py
+++ b/email_server/server_runner.py
@@ -9,11 +9,11 @@ import sys
 import os
 
 # Import our modules
-from config import SMTP_PORT, SMTP_TLS_PORT, HOSTNAME, LOG_LEVEL
-from models import create_tables
-from smtp_handler import CustomSMTPHandler, PlainController
-from tls_utils import generate_self_signed_cert, create_ssl_context
-from dkim_manager import DKIMManager
+from .config import SMTP_PORT, SMTP_TLS_PORT, HOSTNAME, LOG_LEVEL
+from .models import create_tables
+from .smtp_handler import CustomSMTPHandler, PlainController
+from .tls_utils import generate_self_signed_cert, create_ssl_context
+from .dkim_manager import DKIMManager
 from aiosmtpd.controller import Controller
 from aiosmtpd.smtp import SMTP as AIOSMTP
 
@@ -32,7 +32,7 @@ except RuntimeError:
     # No running loop, set debug when we create one
     pass
 
-async def main():
+async def start_server():
     """Main server function."""
     logger.info("Starting SMTP Server with DKIM support...")
     
@@ -46,7 +46,7 @@ async def main():
     dkim_manager.initialize_default_keys()
     
     # Add test data if needed
-    from models import Session, Domain, User, WhitelistedIP, hash_password
+    from .models import Session, Domain, User, WhitelistedIP, hash_password
     session = Session()
     try:
         # Add example.com domain if not exists
@@ -148,7 +148,7 @@ async def main():
 
 if __name__ == '__main__':
     try:
-        asyncio.run(main())
+        asyncio.run(start_server())
     except KeyboardInterrupt:
         logger.info('Server interrupted by user')
         sys.exit(0)
diff --git a/email_server/smtp_handler.py b/email_server/smtp_handler.py
index 3b0f0c4..49c7c98 100644
--- a/email_server/smtp_handler.py
+++ b/email_server/smtp_handler.py
@@ -7,9 +7,9 @@ import uuid
 from datetime import datetime
 from aiosmtpd.smtp import SMTP as AIOSMTP, AuthResult
 from aiosmtpd.controller import Controller
-from auth import Authenticator, IPAuthenticator
-from email_relay import EmailRelay
-from dkim_manager import DKIMManager
+from .auth import Authenticator, IPAuthenticator
+from .email_relay import EmailRelay
+from .dkim_manager import DKIMManager
 
 logger = logging.getLogger(__name__)
 
diff --git a/email_server/tls_utils.py b/email_server/tls_utils.py
index cd1ad8c..219e9b6 100644
--- a/email_server/tls_utils.py
+++ b/email_server/tls_utils.py
@@ -6,7 +6,7 @@ import ssl
 import os
 import logging
 from OpenSSL import crypto
-from config import TLS_CERT_FILE, TLS_KEY_FILE
+from .config import TLS_CERT_FILE, TLS_KEY_FILE
 
 logger = logging.getLogger(__name__)
 
diff --git a/start_server.py b/start_server.py
new file mode 100644
index 0000000..608128c
--- /dev/null
+++ b/start_server.py
@@ -0,0 +1,13 @@
+from email_server import start_server, logger
+import asyncio
+import sys
+
+if __name__ == '__main__':
+    try:
+        asyncio.run(start_server())
+    except KeyboardInterrupt:
+        logger.info('Server interrupted by user')
+        sys.exit(0)
+    except Exception as e:
+        logger.error(f'Server error: {e}')
+        sys.exit(1)
\ No newline at end of file