6. What happens when mail arrives?
Mail coming in to any address ending with
.ox.ac.uk is received
initially by one of the central mail routers (collectively known as oxmail).
These machines are responsible for routing practically all mail traffic within the
University. The mailers hold details of all Oxford email addresses and the routing
information (username/server combinations) associated with them. When a message arrives,
the mailer checks to see if it is for an address it knows about and has routing
information for. If so, it passes the message on to the relevant account on the correct
server for that address. If the server is temporarily out of action, oxmail will hold the
message and attempt to send it later.