> Are you saying the QM has its own recursive/smart resolver? because > some Imail machines don't have access to a resolving, external DNS?
I believe Christian is referring to the Win2K+ DNS cache service, which is tied to the underlying OS resolver. IMail implements its own DNS resolver, which of course uses the OS TCP/IP stack, yet does not tap into the OS DNS cache. Neither the Windows nor the IMail resolver, with or without their DNS caches enabled, themselves perform recursion. They just set the usual recursion flag in their requests. (Since they then, somewhat abnormally for resolvers, manage TTLs and an in-memory cache, you could perhaps liken them to a caching DNS server that solely uses forwarders.) > How could someone run an mail server without an external DNS? I think "local" here refers to either a LAN-speed DNS server on the local net, or a locally-hosted daemon on the loopback address. Christian means to distinguish this from those who use their ISP's DNS servers, likely due to a lack of in-house expertise, yet who have insufficient bandwidth relative to their DNS demands. This may seem like a rare situation (given some of the associative relationships between mail load and IT staffing), but it's out there. --Sandy ------------------------------------ Sanford Whiteman, Chief Technologist Broadleaf Systems, a division of Cypress Integrated Systems, Inc. e-mail: [EMAIL PROTECTED] SpamAssassin plugs into Declude! http://www.imprimia.com/products/software/freeutils/SPAMC32/download/release/ Defuse Dictionary Attacks: Turn Exchange or IMail mailboxes into IMail Aliases! http://www.imprimia.com/products/software/freeutils/exchange2aliases/download/release/ http://www.imprimia.com/products/software/freeutils/ldap2aliases/download/release/ To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
