diff --git a/utils.py b/utils.py
index 8fa8fd7..568cf5f 100644
--- a/utils.py
+++ b/utils.py
@@ -5,6 +5,7 @@ from email.mime.text import MIMEText
 import os
 import uuid
 import config
+import subprocess
 from werkzeug.utils import secure_filename
 from app import logger
 
@@ -35,12 +36,18 @@ def send_email(recipient_email, subject, body):
             logger.error(f"Failed to send email via SMTP to {recipient_email}: {e}")
     else:
         try:
-            process = os.popen("/usr/sbin/sendmail -t")
-            process.write(f"To: {recipient_email}\n")
-            process.write(f"Subject: {subject}\n")
-            process.write(f"\n{body}")
-            process.close()
-            logger.info(f"Email sent successfully via sendmail to {recipient_email}")
+            process = subprocess.Popen(
+                ["/usr/sbin/sendmail", "-t"],
+                stdin=subprocess.PIPE,
+                stderr=subprocess.PIPE
+            )
+            email_message = f"To: {recipient_email}\nSubject: {subject}\n\n{body}"
+            stdout, stderr = process.communicate(input=email_message.encode())
+
+            if process.returncode != 0:
+                logger.error(f"Sendmail error: {stderr.decode().strip()}")
+            else:
+                logger.info(f"Email sent successfully via sendmail to {recipient_email}")
         except Exception as e:
             logger.error(f"Failed to send email via local sendmail to {recipient_email}: {e}")