Hi
thanks for that - I will talk to the hosts again and suggest those things to them, see what they say. Though last time they just suggested I look for scripts that I didn't put there and that was it. Maybe it's time to change servers/hosts?

The contents of one of the emails is below including all headers (in case you fancy having a look - most of doesn't mean much to me!) The text\at the bottom 'thank you for contacting...etc.' is an automated response from my afh.php script I got from Cluxa.com - that goes out when someone has contacted the bookpuppy site. Could the problem be in this script do you think?

The email content reads:

From MAILER-DAEMON Wed Jul 13 13:31:52 2005
Return-path: <>
Envelope-to: edjames@chicago.bigwebspace.com
Delivery-date: Wed, 13 Jul 2005 13:31:52 -0500
Received: from mailnull by chicago.bigwebspace.com with local (Exim 4.51 (FreeBSD))
id 1Dsm1Q-000Fhr-NJ
for edjames@chicago.bigwebspace.com; Wed, 13 Jul 2005 13:31:52 -0500
X-Failed-Recipients: ralxqknxyhnym@yahoo.com
Auto-Submitted: auto-generated
From: Mail Delivery System <Mailer-Daemon@chicago.bigwebspace.com>
To: edjames@chicago.bigwebspace.com
Subject: Mail delivery failed: returning message to sender
Message-Id: <E1Dsm1Q-000Fhr-NJ@chicago.bigwebspace.com>
Date: Wed, 13 Jul 2005 13:31:52 -0500
Status: R

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

ralxqknxyhnym@yahoo.com
SMTP error from remote mail server after end of data:
host mx2.mail.yahoo.com [4.79.181.13]: 554 delivery error:
dd This user doesn't have a yahoo.com account (ralxqknxyhnym@yahoo.com) [0] - mta174.mail.mud.yahoo.com

------ This is a copy of the message, including all the headers. ------

Return-path: <edjames@chicago.bigwebspace.com>
Received: from edjames by chicago.bigwebspace.com with local (Exim 4.51 (FreeBSD))
id 1Dsm1Q-000Fhj-2A
for ralxqknxyhnym@yahoo.com; Wed, 13 Jul 2005 13:31:52 -0500
To: Greg Parrish <ralxqknxyhnym@yahoo.com>
X-Autorespond: Microcap St0ck Trading Idea For You [Wed, 13 Jul 2005 23:24:17 +0400]
X-Loop: Greg Parrish <ralxqknxyhnym@yahoo.com>
From: "Enquiries" <enquiries@bookpuppy.co.uk>
Content-type: text/plain; charset=us-ascii
Subject: Thank you for your enquiry
Message-Id: <E1Dsm1Q-000Fhj-2A@chicago.bigwebspace.com>
Date: Wed, 13 Jul 2005 13:31:52 -0500

Thank you for contacting bookpuppy.co.uk
We have your email and are dealing with your enquiry. We will get back to you shortly.
bookpuppy


Luke