Antispam: Concordia mail relay hosts

Here is the current list of Concordia hosts acting as SMTP relays; connections to port 25 of these hosts are passed through the gateway router. Other port 25 connections from the "outside" are denied.

Note that subdomains "me" and "civil" are MXed to Clyde and handled with mailertable entries to redirect the mail to the "real" MXes for those domains. Other subdomains are MXed to their relays as indicated above; some use Clyde as a secondary MX, but in those cases Clyde simply queues the mail until the subdomain relay becomes available.

The rest of the concordia.ca domain is MXed to Bonnie and Clyde (primary, at preference 20) and NewNewsflash (secondary, at preference 30). These two relay machines route mail to the domain using mailertables, which are created every time the DNS changes. Mail is delivered directly to each machine in the concordia.ca domain, unless alternative arrangements have been made with the postmaster.

Currently, mail is delivered by the relays to all machines. There is a possibility that at some time in the future, only those machines which register as mail servers will receive mail, with mail for other machines being bounced with an error. If you are a Concordia postmaster (or subnet admin or departmental computer guru) and you wish to join the discussion on this, please enquire with the postmaster about the "postmasters" mailing list.

If you're interested, you may look at the software we are using to generate the mailertable based on the DNS registrations.

Copyright, © 2004, Concordia University,
Instructional and Information Technology Services (IITS).

Author: Anne Bennett
Credits: (none)
Maintained by: postmaster@concordia.ca
Last update: 2004/03/10 -- Sylvain Robitaille

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