$header .= "Reply-To: Some One <[email protected]>\r\n"; $header .= "Return-Path: Some One <[email protected]>\r\n"; $header .= "From: Some One <[email protected]>\r\n"; $header .= "Boletin: Mi boletin\r\n"; $header .= "Content-Type: text/plain\r\n"; mail("[email protected]", "Test Message", "This is my message.", $header);