Send copy of contact us email to customer

So I was looking at the contact us header file located under modules and trying to distinguish the code that is sending emails. What I am trying to accomplish is the same copy of the email I get with customer questions through the contact us form, to also send a duplicate to the customer. What I concluded was this function: "zen_mail()". But do I just stick this under the store email being sent and how would I code the customer email within the zen mail function.

STOP for a moment and consider the problems with doing that: If you have a spammer come to your site and wants to cause trouble, if you make that change you will be letting them send spam to ANYONE simply by virtue of entering whatever email address they desire to spam. And then when the recipient gets that message and reports it as spam, your website will be blacklisted because it was the sender. Same if the recipient address is bogus: the spam filter programs on the mailserver will see that YOUR site sent the message and blacklist it.

So, now that you've considered the BIG negative consequence of doing what you suggested, can you explain what business problem you were trying to solve by that particular technical "solution"?
And is there a better way to accomplish the same business result without putting your website at risk?

DrByte:

STOP for a moment and consider the problems with doing that: If you have a spammer come to your site and wants to cause trouble, if you make that change you will be letting them send spam to ANYONE simply by virtue of entering whatever email address they desire to spam. And then when the recipient gets that message and reports it as spam, your website will be blacklisted because it was the sender. Same if the recipient address is bogus: the spam filter programs on the mailserver will see that YOUR site sent the message and blacklist it.

So, now that you've considered the BIG negative consequence of doing what you suggested, can you explain what business problem you were trying to solve by that particular technical "solution"?
And is there a better way to accomplish the same business result without putting your website at risk?

Thanks DrByte, I did not know that it would affect my website negatively like that. After knowing now, I decided it is not worth it as it would really erase all the effort I did to build my site. Very glad I asked before having someone else do it. I will instead include the extra information upon the success screen for customers to see. I did not know where to edit that part, but finally found with the tool kit, a great resource.