On Mar 18, 2007, at 6:11 AM, Jeff Lasman wrote: > For a long time now our dedicated server clients have been asking > us to > run backup mx for them. The reason we haven't agreed to do so is > because I've not found an easy way around the problem of callouts not > being available when the primary mx server is offline. > > I can think of a way to tackle this: creating a file of usernames in > real time on their servers, and copying it over to our backup mx > server > at an agreed-upon interval. I just haven't wanted to go through the > trouble. > > Has anyone come up with any better ideas?
It depends a bit on what you want to achieve with this, I suppose. If you want to never accept an e-mail to an address that doesn't exist, then I suppose such a list is really the only option. If you simply want to avoid a situation where your secondary refuses email because the primary is unavailable (which would be sortof counterproductive), then how about the defer_ok option? That would make the verification pass if the callout didn't work out because of, for instance, the primary box being down. This is what I use on my secondary. -- ## List details at http://www.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://www.exim.org/eximwiki/
