Retrive Messages withou deleting them

Hi all,

I need to get the data to the database without deleting them from server.

I tried commenting following part.
////////////////////////////////////////
function email_delete(){

//imap_delete($this->link, $this->msgid);

}

function email_delete(){

//imap_delete($this->link, $this->msgid);

}

/**
* Delete marked messages
*/
function email_expunge(){

//imap_expunge($this->link);

}

//////////////////////////////////////

but then it takes only one email to db.

Please help me to do this