Using MX RRs

MX RRs are really very useful! We found 130994 of these records in the european database. Obviously, this represents a lot of different policies of mail routing and we found lots and lots of MX RRs pointing to unknown hosts. France is the country with less MX RRs pointing to hosts outside the country (with 0 of such MXs). This doesn't mean that all of those MXs were pointing to valid hosts. At least in 437 of these RRs a missing trailing dot is present in the name of the mail gateway.

Finally, it is also interesting to know the top 20 most popular european gateways (See Table 6).


Table 6: Most popular mail gateways in Europe (1992, April the 14th)

5627  mcsun.eu.net
5585  chenas.inria.fr
3800  dxmint.cern.ch
3654  cernvax.cern.ch
3266  sicvaxb.epfl.ch
3250  mail.germany.eu.net
2737  nsfnet-relay.ac.uk
2716  sun2.nsfnet-relay.ac.uk
2009  relay.surfnet.nl
1804  hearnvax.nic.surfnet.nl
1516  mailgzrz.tu-berlin.de
1419  mailszrz.zrz.tu-berlin.de
1379  nz11.rz.uni-karlsruhe.de
1379  netserv.rz.uni-karlsruhe.de
1335  sunic.sunet.se
1264  sun4nl.nluug.nl
1159  dutrun.tudelft.nl
1157  tudrva.tudelft.nl
1086  funet.fi
1059  chx400.switch.ch