553 5.1.8 <...>... Domain of sender address does not exist

[dasa123]

Dear all,

we are using a system "consrv1" under RH 7.3 with sendmail 8.12.11
where the .cf file was installed via this .mc file

divert(0)dnl
VERSIONID(`$Id: generic-linux.mc,v 8.1 1999/09/24 22:48:05 gshapiro
Exp $')
OSTYPE(linux)dnl
DOMAIN(eso-io.com)dnl
GENERICS_DOMAIN(eso-io.com)dnl
define(SMART_HOST,mail-s)dnl
FEATURE(generics_entire_domain)dnl
FEATURE(accept_unresolvable_domains)dnl
MASQUERADE_AS(eso-io.com)dnl
MAILER(local)dnl
MAILER(smtp)dnl

mail-s is running Solaris 8 and is the DNS and MX server for the
"eso-io.com" domain.

e-mail from user 'oracle' to Rainer.Blaes@space.eads.net from the
"consrv1" system is not delivered instead this message is appearing:


----- The following addresses had permanent fatal errors -----

<Rainer.Blaes@space.eads.net>
(reason: 553 5.1.8 <oracle@consrv1.eso-io.com>... Domain of sender
address oracle@consrv1.eso-io.com does not exist)

----- Transcript of session follows -----
... while talking to smtp-01.mgn.fr.:
^^^^^^^^^^^^^^^^

>>> MAIL From:<oracle@consrv1.eso-io.com>
<<< 553 5.1.8 <oracle@consrv1.eso-io.com>... Domain of sender address
oracle@consrv1.eso-io.com does not exist
501 5.6.0 Data format error

&quot;smtp-01.mgn.fr&quot; is the MX mailer for the space.eads.net domain.

Although I'm using masquerading on &quot;consrv1&quot; i.e.

> /tryflags HS
> /try esmtp oracle@consrv1.eso-io.com
Trying header sender address oracle@consrv1.eso-io.com for mailer
esmtp
canonify input: oracle @ consrv1 . eso-io . com
Canonify2 input: oracle < @ consrv1 . eso-io . com >
Canonify2 returns: oracle < @ consrv1 . eso-io . com . >
canonify returns: oracle < @ consrv1 . eso-io . com . >
1 input: oracle < @ consrv1 . eso-io . com . >
1 returns: oracle < @ consrv1 . eso-io . com . >
HdrFromSMTP input: oracle < @ consrv1 . eso-io . com . >
PseudoToReal input: oracle < @ consrv1 . eso-io . com . >
PseudoToReal returns: oracle < @ consrv1 . eso-io . com . >
MasqSMTP input: oracle < @ consrv1 . eso-io . com . >
MasqSMTP returns: oracle < @ consrv1 . eso-io . com . >
MasqHdr input: oracle < @ consrv1 . eso-io . com . >
MasqHdr returns: oracle < @ eso-io . com . >
HdrFromSMTP returns: oracle < @ eso-io . com . >
final input: oracle < @ eso-io . com . >
final returns: oracle @ eso-io . com
Rcode = 0, addr = oracle@eso-io.com

the mail-s mqueue is showing these entries:

/var/spool/mqueue (2 requests)
-----Q-ID----- --Size-- -----Q-Time-----
------------Sender/Recipient-----------
i15FAhqJ025289* 5 Thu Feb 5 16:10 <oracle@consrv1.eso-io.com>
<Rainer.Blaes@space.eads.net>
i15FBFqJ025292* 2071 Thu Feb 5 16:11 MAILER-DAEMON
<oracle@consrv1.eso-io.com>

If masquerading is working why do I see in the sender address
the hostname consrv1 here.

If I'm using the command

/usr/lib/sendmail -f oracle@eso-io.com ........

the mail get delivered.

What's wrong here in our environment?

In advance many thanks for every hints!

Rainer Blaes, EADS ST, Bremen (Germany)