jimr@maths.su.oz.au (Jim Richardson) (05/30/90)
Correctly addressed mail to some sites in Switzerland is sometimes being bounced, apparently because of an error in the nameserver configuration. For example, ethz.ch has the following MX records: ethz MX 10 chx400.switch.ch ethz MX 20 relay.EU.net Now chx400.switch.ch has an A record, but relay.eu.net does not seem to exist. It has no A record; the only information in DNS relating to it seems to be relay.eu.net preference = 10, mail exchanger = mcsun.eu.net If chx400 is down or unreachable, sendmail tries relay.eu.net, and the message is returned to the sender with a "Host unknown" error. Note that sendmail should *not* be expected to take note of a "second level" MX record like the one for relay.eu.net. Should the ethz preference 20 MX record (and other similar records for other Swiss domains) refer to mcsun.eu.net instead of relay.eu.net? Mail to the domain contact and the postmaster hasn't had any apparent effect. Apologies in advance if I've misinterpreted the problem and it is at my end somehow: if so, advice would be appreciated. -- Jim Richardson Department of Pure Mathematics, University of Sydney, NSW 2006, Australia Internet: jimr@maths.su.oz.au ACSNET: jimr@maths.su.oz FAX: +61 2 692 4534