[Mailman-Users] Problems with Mailman/Exim4 mailinglists forcertain senders

[Mark Sapiro]

Nicolas Neuss wrote:
>
>I'm using the Mailman package with Exim 4 on a Debian Etch/testing system
>'ruprecht.mathematik.uni-karlsruhe.de' (which is an alias for
>'ma-slave.mathematik.uni-karlsruhe.de', BTW).

This is your problem. You cannot reliably deliver mail to a CNAME. In
order to reliably deliver mail to
'ruprecht.mathematik.uni-karlsruhe.de', it must have an A record or an
MX record, the target of which has an A record.

What I see in DNS is

ruprecht.mathematik.uni-karlsruhe.de. 86400 IN CNAME
ma-slave.mathematik.uni-karlsruhe.de.

and

ma-slave.mathematik.uni-karlsruhe.de. 86400 IN A 129.13.253.25

and

ma-slave.mathematik.uni-karlsruhe.de. 86400 IN MX 100
mailin.rz.uni-karlsruhe.de.

What you need is

ruprecht.mathematik.uni-karlsruhe.de. 86400 IN MX 100
mailin.rz.uni-karlsruhe.de.

and additionally if you need the address

ruprecht.mathematik.uni-karlsruhe.de. 86400 IN A 129.13.253.25

and definitely no CNAME.

-- 
Mark Sapiro <mark at msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan