HELP -- I'm beside myself and hope I'm overlooking something simple. Have an Exchange 2003 with SP1 that worked well for a week and now when the virtual SMTP server is started, the Internet slows to a crawl. Here's what I've done and noted: -- No significant entries in the Event Log -- a couple entries for a blacklist www.sorbs.net, but am in process of cleaning that up -- no other dnsblacklists. -- No large numbers of entries/messages in Queues of ESM -- Have a Cisco PIX 501 on outside, and enabled logging... Not much there either in terms of activity -- Have Symantec 10 and Mail Security on this which I believe are configured correctly. -- there is really just not a lot of traffic going on. It appears that the main problem is when the smtp service and/or smtp virtual server is started. Any Internet access is very SLOW and they Terminal Service users (which is on another server) are complaining. Any suggestions greatly appreciated!! Thanks. Lee Swanson