Our current mail system's configuration
April 7, 2010
A while back I described our old mail system's configuration. Now it's time to describe our current mail system's configuration ('current' as of April 2010, although it's been pretty stable for the past year or two).
Unlike our old mail system, we now trust NFS; we keep
The current email system looks like this:
There is still a separate mail submission machine for outgoing email (whether from user PCs or our servers). As before, it routes email for our domains to the central mail machine and otherwise sends email straight to the outside world.
There is a separate IMAP/POP server; it accesses everything over NFS,
with user inboxes in the NFS-mounted
That the MX gateway is separate from the central mail machine is
an accident of history, but I think that it simplifies the mailer
configuration for both of them. It also means that the system is more
resilient in the face of NFS fileserver problems. Since the central mail
(All of these machines have mirrored system disks, because they do have email sitting in their local spool areas while it's in the process of being delivered or shuffled around.)
Written on 07 April 2010.
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