This document is an attempt to explain some of the fairly intricate processes that run on Nexus is an attempt to manage an issue called 'split routing'. Split routing is where mail sent from Nexus ends up in a different place from mail sent from outside Nexus. It is aimed at IT Services Help Centre Staff and ITSS. We don't pretend it is easy. Remember all addresses associated with a nexus account will be an Oxford controlled address.
If someone is logged onto Nexus using Outlook via MAPI, or OWA and sends to
email@example.com appears on an account on Nexus (ie the
Sending address), then the message wont go out to the Oxmails but will be delivered
directly to the Nexus account
fluff0001. (There is no way for Exchange to
work in any other way- it cant be forced to send mail to the oxmails.)
As long as in the mailer tables
firstname.lastname@example.org routes to
fluff0001@nexus then mail sent from outside Nexus will also end up in the
fluff001@nexus and all is well. The mailer routings are visible in the
Mail Routing tab in WebReg , and ITSS's https://register.it.ox.ac.uk/itss/mail_routing
HelpCentre/ITSS change the routing for the OxMails
email@example.com goes to
what happens to mail sent from people on Nexus? It still goes to
fluff0001@nexus and Fluffy's mail is in two places!!!
- if the sending address on the Nexus account is in the mailer tables, and is
not routed to nexus, it will set an automatic forward on Nexus to where the
Oxmails would send the mail. As it would now see that
fluffy.brown@spiresnow routes to
firstname.lastname@example.org, it would automatically put a forward on
fluff0001@nexusto go to
fluffy@gmailand all Fluffy's mail will be in the one place ie gmail.
- If there is already forward set on the nexus account, say to old hotmail address, then no additional forwarding will be set and the user will stay with split routing until it is fixed.
- if the address on Nexus is from domain that IT Services manages, it will be look like
Forwarding to : email@example.com
- if you manually remove the forward, it will be added back the next time the Nexus process runs so that the routing and the forwarding match.
If ITSS or HelpCentre staff...
- record the address in the IT Services database via WebReg or ITSS info
AND give the Nexus account
math1234the sending address of eg
Nexus processes will.....
- Add the forwarding to
math1234which looks like
Forwarding to : firstname.lastname@example.org
- Mail sent from other Nexus
email@example.com go to
math1234@nexuswhich will then forward it to the real
math1234@nexuscannot have a forward of just
firstname.lastname@example.org Nexus would say ... 'yes I know that address it is on account math1234' and would try and deliver the mail to back to
math1234@nexusand a mail loop would be set up.
If the address associated with the account changes, the effect will depend on where the addresses are routed. If they are both to Nexus, the only effect will be on Calendering with ical/davmail which uses the email address rather than the username to make associations for sharing. See for example http://www.oucs.ox.ac.uk/nexus/calendar/iCal/davmail.xml where it refers to someones primary email address.
If the address on the account changes to one that is not routed to Nexus, then a forward will be automatically added. Even if you remove the forward it will be added back the next time the Nexus process runs!!
.ox.ac.ukdomain to be able to set on the account.
- from non-maintained depts where that dept does not issue an email address eg Computer Sciences don't issue addresses for new visitors
- from OUP
- where there is no mail routing set up for whatever reason eg retired/ nomail
username@nexus. This is not something we want to perpetuate and we will be looking at ways to remove these accounts by detaching mailboxes and setting the account status to 'User' rather than 'UserMailbox' or 'MailUser' , or for active users, or negotiating with the dept to get an address assigned.