Sendmail Mailer Invocation problem

[Gary Mills]

Has anybody else seen this problem?  We run Sendmail 1.9 under SunOs 4.0,
with a sendmail.cf that is supposed to route most external mail to an
X.400 mailer called `ean'.  Here is the mailer specification:

Mean,  P=/usr/local/lib/ean/mailer, F=fmnDFMS, S=17, R=17, A=mailer -d $u

When I attempt to mail to `user at host.arpa', the `ean' mailer is invoked
with the arguments: `mailer -f ... -d user at host.arpa@ccu.umanitoba.ca',
which is an invalid recipient address.  The `ccu.umanitoba.ca' comes from
our hostname in /etc/hosts, which is:

130.179.16.8   ccu.umanitoba.ca ccu loghost mailhost

It is nowhere defined in sendmail.cf.  Why is this happening?  In address
test mode, I get:

rewrite: ruleset  0 returns: $# "ean" $@ "ccu" $: "user" "@" "host" "." "arpa"

Rulesets 17 and 4 act normally and return `user at host.arpa'.

-Gary Mills-          -University of Manitoba-            -Winnipeg-