diff --git a/main.py b/main.py
index 1904483..e0554d3 100644
--- a/main.py
+++ b/main.py
@@ -26,8 +26,7 @@ class SMTPWebhookApp:
     def _send_mail(self):
 
         if not cherrypy.request.headers.get('Content-Length'):
-            logging.error("To: {}, error: Invalid content length.".format(
-                        TO_MAIL))
+            logging.error("error: Invalid content length.")
             return {"status": 400, "message": "Invalid content length."}
 
         cl = cherrypy.request.headers['Content-Length']
@@ -35,30 +34,33 @@ class SMTPWebhookApp:
         req_body = json.loads(rawbody)
 
         if not req_body.get('subject') or req_body.get('subject') == '':
-            logging.error("To: {}, error: body field is required.".format(
-                        TO_MAIL))
+            logging.error("error: body field is required.")
             return {"status": 400, "message": "subject field is required."}
 
         if not req_body.get('body') or req_body.get('body') == '':
-            logging.error("To: {}, error: body field is required.".format(
-                        TO_MAIL))
+            logging.error("error: body field is required.")
             return {"status": 400, "message": "body field is required."}
 
+        if not req_body.get('to_mail') or req_body.get('to_mail') == '':
+            logging.error("error: to_mail field is required.")
+            return {"status": 400, "message": "to_mail field is required."}
+
         subject = req_body['subject']
         body = req_body['body']
+        to_mail = req_body['to_mail']
 
         try:
             client = smtplib.SMTP(host=SMTP_SERVER_HOST, port=SMTP_SERVER_PORT)
         except (smtplib.SMTPConnectionError, TimeoutError) as e:
             time.sleep(0.2)
-            logging.error("To: {}, error: {}".format(TO_MAIL, e))
+            logging.error("To: {}, error: {}".format(to_mail, e))
             return {"status": 400, "message": "SMTP client error: {}.".format(
                     e)}
 
         msg = MIMEText(body, 'plain', 'utf-8')
         msg['Subject'] = Header(subject, 'utf-8')
         msg['From'] = FROM_MAIL
-        msg['To'] = TO_MAIL
+        msg['To'] = to_mail
         try:
             client.ehlo()
             client.starttls()
@@ -66,10 +68,10 @@ class SMTPWebhookApp:
             client.login(msg["From"], FROM_MAIL_PASSWORD)
             client.sendmail(msg['From'], msg['To'], msg.as_string())
             response = {"status": 200, "message": "mail sent successfully"}
-            logging.info("To: {}, mail sent successfully".format(TO_MAIL))
+            logging.info("To: {}, mail sent successfully".format(to_mail))
         except smtplib.SMTPException as e:
             time.sleep(0.2)
-            logging.error("To: {}, error: {}".format(TO_MAIL, e))
+            logging.error("To: {}, error: {}".format(to_mail, e))
             response = {"status": 500, "message": "some error: {}".format(e)}
         finally:
             client.quit()
@@ -95,12 +97,11 @@ CHERRYPY_SERVER_PORT = 8081
 if __name__ == "__main__":
     try:
         SMTP_SERVER_HOST = os.environ["SMTP_SERVER_HOST"]
-        TO_MAIL = os.environ["TO_MAIL"]
         FROM_MAIL = os.environ["FROM_MAIL"]
         FROM_MAIL_PASSWORD = os.environ["FROM_MAIL_PASSWORD"]
     except KeyError:
         raise KeyError("Please check missing environment variables: "
-                       "SMTP_SERVER_HOST, TO_MAIL, FROM_MAIL, "
+                       "SMTP_SERVER_HOST, FROM_MAIL, "
                        "FROM_MAIL_PASSWORD")
 
     cherrypy.server.socket_host = CHERRYPY_SERVER_HOST