I am trying to write a custom function that will send an email to the user who sent a mail to the support-id.

When I am executing the script the mail is not going and there is no way for me to know what happened. Why the mail did not go. 

Also, my custom function is being run when a new ticket comes in. This i can see in using the "History" link, but there is nothing shown in the "Failure" section. But The mail is also not going.