Send Autoconfirmation Mail using google script

Send Autoconfirmation Mail using google script

i want to send an auto response mail(confirmation mail) using Google
scripts, when i searched in net got one script the problem is that i run
only if we give a predefined value in the script Example if there 5 rows
have data i need to give no of rows to send as 5 I wanted to send a mail
for any no of email id without specifying.
https://developers.google.com/apps-script/articles/sending_emails
In this i have used Section 2: Improvements
There is another issue is i need to create separate column for email id
since in the code we say from which row & column to start & end. I just
wanted to specify email id column name or number in script based on input
it should sent mail & also check whether the email id is valid or not