Afternoon All, I've been having a look at the exchange best practices analyser. It is giving me a result of "VSAPI low thread count" I followed the link to this article http://www.microsoft.com/technet/prodtechnol/exchange/EXBPA/73f39ae7-500 b-48f4-9c50-1ea62a3440ef.mspx Current config Email Server Exchange 2003 SP1 Windows 2003 SMTP Gateway (controls all incoming / outgoing emails) Windows 2003 Sophos Anti Spam / Virus software Would I need to enable this setting? As I can't seem to find anything that advises on this Many thanks Simon Whale This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify admin@xxxxxxxxxxxxxxx The views expressed in this email are those of the individual and not necessarily those of UK Data IT This footnote also confirms that this email message has been swept by SOPHOS AV for the presence of computer viruses. Web site: www.ukdatait.co.uk Registered Office: UK Data IT House, Shrub HIll Road, Worcester, WR4 9EF Registered Company Number: 3884834