Update mail.py

Added more variables
Capitalize variable name
Added `Whole_mail`

mail.py

 # Some variable for email
-my_email = 'admin@localhost'
-info_url = 'https://www.google.com'
+Server = 'localhost'
+My_email = 'admin@localhost'
+Sender = 'ADMIN@LISTSERV.LOCALHOST'
+Sender_alias = 'Services'
+Subject = 'New User Account'
+Info_url = 'https://www.google.com'
 
-body = f"""
+Head = f"""From: {Sender_alias} <{Sender}>
+To: <{{{{ to }}}}>
+Subject: {Subject}
+"""
+
+Body = f"""
 Hi {{{{ username }}}}
 Your account has been set up with:
 
@@ -11,9 +20,11 @@ User ID:  {{{{ username }}}}
 ============================
 
 If you have any questions, please visit:
-{info_url}
+{Info_url}
 
-or email at {my_email}
+or email at {My_email}
 
 Cheers,
 """
+
+Whole_mail = Head + Body