[IMail Forum] Backup Servers

[Stephen LaBuda]

What solution is available to allow an ISP to continue to allow SMTP service when the Entire Mail server goes down.   We currently have a backup Store and send imail server to capture all incoming mail but our users could not send mail for almost a 14 hour period.  Are there any creative DNS solutions available?  Does Peering through Imail resolve this issue?  What about Len's IMGate?  Does this accomplish this task?   I hope I am making sense with my terminology.   Stephen LaBuda