Sure - I think anyone who's looked as probably seen evidence of that - though I'd say caching of failed lookups is a more common occurrence. But, being as we are dealing with clients who we are trying to provide transparent fail over for, I'm not sure what other option you think anyone has... Not everyone can obtain portable address blocks and configure BGP you know...
Also, if the ISP IS doing this, I've found complaining to actually be an effective way to get change to happen. When you have a group of people willing to cancel or change providers due to a failure of service, the ISP can be made to listen... m/ > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of Matt > Pavlovich > Sent: July 12, 2003 2:41 PM > To: [EMAIL PROTECTED] > Subject: Re: [courier-users] Disaster tolerant IMAP and SMTP ? > > > Using a low DNS TTL is not a very reliable method for ensuring failover > via DNS update. Most large DNS shops will not honor TTL's below a > certain threshold - 12hrs, 1 day, etc.. > > Matt Pavlovich > ------------------------------------------------------- This SF.Net email sponsored by: Parasoft Error proof Web apps, automate testing & more. Download & eval WebKing and get a free book. www.parasoft.com/bulletproofapps1 _______________________________________________ courier-users mailing list [EMAIL PROTECTED] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
