I have PhpSuexec enabled and the headers sent from php mail are like that: Code: Return-Path: <user@admin.hostname.com> Received: from thurs by admin.hostname.com with local (Exim 4.66) (envelope-from <thurs@admin.hostname.com>) id 1IZj0S-0002n5-Vy for email@site.com; Mon, 24 Sep 2007 04:09:07 -0400 To: email@site.com From: Thurs Admin <support@hostname.com> admin.hostname.com is the server hostname. Is it possible to set the Return_path and envelope from to the email listed in From header? I've tried add 'untrusted_set_sender = *@+local_domains' in the Exim config but that doesn't work. Please help, this is a common problem for receiving the emails sent by php to aol and yahoo recepients. My exim config is: Code: queue_only_override = false no_message_logs log_selector = +arguments +subject timeout_frozen_after = 4d ignore_bounce_errors_after = 2d local_from_check = false untrusted_set_sender = *@+local_domains