do it at your gateway if at all. don't put excess load on your exchange server and don't tell me you don't have a mail gateway or i will scream!! but the question still would be why, use other methods to block spam!! Greg Mulholland ________________________________ From: exchangelist-bounce@xxxxxxxxxxxxx on behalf of Andrew English Sent: Wed 17/05/2006 8:52 AM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Re: Reverse Lookup http://www.msexchange.org ------------------------------------------------------- How do I get Exchange to do a reverse lookup of the IP address it's sending an email to before sending it to check if it's valid or not, and if it's not valid to drop the email all together? Thanks Andrew ------------------------------------------------------- List Archives: //www.freelists.org/archives/exchangelist/ MSExchange Newsletter: http://www.msexchange.org/pages/newsletter.asp MSExchange Articles and Tutorials: http://www.msexchange.org/articles_tutorials/ MSExchange Blogs: http://blogs.msexchange.org/ ------------------------------------------------------- Visit TechGenix.com for more information about our other sites: http://www.techgenix.com ------------------------------------------------------- To unsubscribe visit http://www.msexchange.org/pages/exchangelist.asp Report abuse to listadmin@xxxxxxxxxxxxxx