191596 edit EMA autoresponder script.

My host made a change to their mail policy. EMA Autoresponder free uses sendmail. The host says this line need to be added to the script to make it wirk. I have no idea where to add the line of code so that it will mail from my domain and not the shared server sendmail. Can anyone help me out with this? I hope this makes sense. Here is the line of code they say to add from a [login to view URL] file they gave me. change the at to at sign ini_set('sendmail_from', '[login to view URL]');