UUNet does this for me and it works fine. They maintain our zone file on their DNS server and there are two entries, one for my mail server and one, with a higher cost, that is their mail server. So if mine goes down it queues on their server until mine comes back on line. Had a scheduled power outage while the power company upgraded our electric service and it worked great.
-----Original Message----- From: William Lefkovics [mailto:[EMAIL PROTECTED]] Sent: Wednesday, June 12, 2002 2:16 PM To: MS-Exchange Admin Issues Subject: RE: testing for failure Why can't your hosting company just queue the email instead of having it sit in a mailbox? -----Original Message----- From: Clark, Steve [mailto:[EMAIL PROTECTED]] Sent: Wednesday, June 12, 2002 11:08 AM To: MS-Exchange Admin Issues Subject: testing for failure Not quite sure if this is OT or not - regardless, here it goes. I have an Exchange mail server in an office with an internal address 192.x.x.x. All mail is handled by the Netscreen firewall and "routed" to the Exchange server. That all works well. I have requested the hosting company to set up a 2nd rule in the zone file such that if the firewall from above is down or gone, forward the mail to this single mailbox and I can pull when the server comes back on-line. My testing process is to disable the IP address that corresponds to the mail.domainname.com in the firewall. I then send a test message to the administrator account and start monitoring the mailbox at ISP to see if email is arriving. No mail ever arrives. After 15 to 30 minutes, I re-enable the config in the firewall and watch mail start to flow shortly thereafter. So here are my questions: 1. How long *should* it take for this failover process to take affect 2. Is my testing process flawed as I am disabling the IP rather than "unplugging" the entire firewall Any thoughts or pointers would be greatly appreciated. Steve Clark Clark Systems Support, LLC AVIEN Charter Member "Who's watching your network?" www.clarksupport.com 301-610-9584 voice 240-465-0323 Efax The data furnished in connection with this document is deemed by Clark Systems Support, LLC., to contain proprietary and privileged information and shall not be disclosed or used for the benefit of others without the prior written permission of Clark Systems Support, LLC. List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
