BCF provides e-mail support for the domains @tue.nl (for faculty members), and @win.tue.nl.
Other domains are not supported.
The technical details are as follows: on the faculty network, port 25 (which is used for SMTP) is closed for outgoing traffic. On the surfnet side of the network, all incoming traffic on port 25 is routed to one of two relay machines. All outgoing traffic must also go through one of these machines. These validate outgoing e-mail by checking the sender domain from a list. Only in exceptional cases will domains be added to this list. E-mail servers on other hosts will therefore not be able to send or receive e-mail.
For the few other domains that we do support, the DNS needs to contain 2 MX records for the domain that point to
This means that incoming e-mail:
- is filtered on obvious spam. Details on this procedure can be requested from the postmaster.
- will be sent on to the correct mailserver, if it's reachable.
- or queued on one of the two relay hosts if the server is not reachable.
This means that you only have to configure your mailserver to relay outgoing e-mail to smtp.win.tue.nl. Incoming e-mail will reach your mailserver as usual (with one extra hop).
Please make sure that all registered mailservers are reachable. Too much queued mail can clog the central mail servers which leads to disruption of service for the whole campus. We will not hesitate to disable queuing for unreachable domains.