re:  postfix config

I think I have postfix on crazyhorse correctly accepting
mail for various domain names, but something is amiss
further upstream.

I can send mail to de@outstitute.org and de@daclarke.net
by a telnet 25 to those virtual domain names respectively,
i.e.

------------------------------------------------------------
[7]de@intai:/u/de% telnet daclarke.net 25
Trying 204.13.164.151...
Connected to daclarke.net.
Escape character is '^]'.
220 24b6.eggplantmedia.com ESMTP Postfix (Debian/GNU)
EHLO ucolick.org
250-24b6.eggplantmedia.com
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-STARTTLS
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
mail from:de@ucolick.org
250 2.1.0 Ok
rcpt to:de@daclarke.net
250 2.1.5 Ok
data
354 End data with .

TEST #3 to de@daclarke.net from de on intai
via telnet 25


.
250 2.0.0 Ok: queued as F13094808EB
quit
221 2.0.0 Bye
Connection closed by foreign host.

-----------------------------------------------------------

this mail is delivered correctly into mailbox /var/mail/de
on crazyhorse.

however when I attempt to use any normal mail agent such
as mail, Mail or mutt from my network at ucolick.org,
I eventually get (from our local postfix mailhub)

: host postfix.eggplantmedia.com[204.13.164.176] said: 554
: Relay access denied (in reply to RCPT TO command)

as if something in your mailhub were rejecting mail for
our vserver.

and in fact I verify this with telnet

--------------------------------------------------------------
[9]de@intai:/u/de% telnet postfix.eggplantmedia.com 25
Trying 204.13.164.176...
Connected to postfix.eggplantmedia.com.
Escape character is '^]'.
220 postfix.eggplantmedia.com ESMTP (spam is not permitted)
EHLO ucolick.org
250-postfix.eggplantmedia.com
250-PIPELINING
250-SIZE 10240000
250-ETRN
250-STARTTLS
250-AUTH PLAIN LOGIN
250-AUTH=PLAIN LOGIN
250 8BITMIME
Mail from:de@ucolick.org
250 Ok
Rcpt to:de@outstitute.org
554 : Relay access denied
-------------------------------------------------------------

your mailhub appears to be denying inbound SMTP to
our preferred domain aliases.

and even to our semi-official "secret" name:

: host
    crazyhorse.eggplantmedia.com[204.13.164.151] said: 554 5.7.1
    : Relay access denied (in reply to RCPT TO
    command)

outbound smtp from crazyhorse appears good so far.  inbound
not happening.

help...?

de