On 10/19/2011 04:10 PM, Paul O'Rorke wrote: > No mailing lists set up - all mail outs to customers are generated by php > scripts on a web server and passed to the mail server for delivery. What > specifically need I look out for here?
I was thinking mailman and the like: if you have two separate instances you end up with two separate list archives and so on. > Do you have any suggestions on some reading for how this works Dimitri? > How does a set up like this ensure the data is the same on both machines > without something like DRDB in place? It would seem I need to learn a great > deal more about Dovecot/IMAP/Maildir. I guess I left out a small detail: NFS-mounted home directories. Sorry. The data is the same on all machines because they're all using the same (nfs-mounted) Maildir. (Basically because each message in a maildir is a separate file with a unique filename, you can have 2 smtp servers delivering to the same maildir and dovecot deleting from it at the same time without any mailbox corruption.) > It seems I have opened quite a can of worms here. Could it really be as > simple as deploying a second host from a snapshot and setting up the new > interfaces? I must be missing something key here. Personally I'm not even sure why run two mail servers. Last I looked at SMTP server down was a temporary error, so the clients would queue the mail and re-try delivery. Typically it'll be a week or more before they give up. By then I'll either have the machine back up and running again or not care (e.g. if our server room is hit by an asteroid size of Texas, I expect to not worry about work not receiving e-mails). -- Dimitri Maziuk Programmer/sysadmin BioMagResBank, UW-Madison -- http://www.bmrb.wisc.edu
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