In a world where most MTA's will retry a message up to 5-7 days, is a secondary MX worth the added maintenance and configuration headache?
I have a primary datacenter in Atlanta where I have a small load balanced cluster of MTA's. I also have a disaster recovery site located in Dallas which can be used should Georgia fall into the Atlantic. Theoretically, a cheap secondary MX located in - say Seattle - would ensure that any email sent during major outages which are less than catastrophic (5 minutes - 5 days) would be spooled and delivered once the primary comes back up. I say "less than catastrophic" meaning that my data center and core infrastructure still exist, but maybe all my hard drives in all my mail servers decide to spontaneously fail. I understand that all anti-spam measures (spamassassin, greylisting, etc) would have to be duplicated on the secondary MX to keep it from becoming a SPAM relay for my domains. I find myself completely torn. Can anyone give me their reasons for using a secondary ... or not using? Oh, btw. This is a small hosting provider setup with ~2000 domains and ~100,000 msgs/day. Thanks! Ken -- ## List details at http://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
