[courier-users] 456 Address temporary unavailable.

I am running courier-0.52.1, on freebsd current. I have serveral
installations with the same configuration and none have problems but on
this machine, I have one user, who was over quota, out of 5 users that
cannot receive mail unless it is sent with a manual telnet on port 25
and then it is delivered. His ldap quota is 5G quota: 5000000000S.
Could has having been over quota have caused a backscatter issue? Any
suggestions will be apreciated.

# less maildirsize
5000000000S
118083937 2465
480 1
571 1
485 1

I just sent a message with telnet and it goes through. Example follows
with a couple of the log entries.

# telnet bafirst.com 25
Trying 72.12.2.214...
Connected to bafirst.com.
Escape character is '^]'.
220 BA te da la mas cordial bienvenido
helo bafirst.com
250 bafirst.com Ok.
mail from: <eculp@encontacto.net>
250 Ok.
rcpt to: <mgarber@bafirst.com>
250 Ok.
data
354 Ok.
yet another test.
..
250 Ok. 43AAAA8C.00005653
quit
221 Bye.
Connection closed by foreign host.

Dec 22 07:31:25 bafirst courierlocal:
id=00095807.43AAAA8C.00005653,from=<eculp@encontac to.net>,addr=<mgarber@bafirst.com>,size=186,succes s: Message
delivered.
Dec 22 07:31:25 bafirst courierd: completed,id=00095807.43AAAA8C.00005653
Dec 22 07:31:25 bafirst courierd: Waiting. shutdown time=Thu Dec 22
08:25:42 2005, wakeup time=Thu Dec 22 07:59:14 2005, queuedelivering=2,
inprogress=0
Dec 22 07:31:34 bafirst imapd: LOGIN, user=eculp@bafirst.com,
ip=[127.0.0.1], protocol=IMAP
Dec 22 07:31:43 bafirst imapd: LOGOUT, user=eculp@bafirst.com,
ip=[127.0.0.1], headers=0, body=0, time=9
Dec 22 07:32:18 bafirst courieresmtpd: started,ip=[207.111.170.48]
Dec 22 07:32:18 bafirst courieresmtpd:
error,relay=207.111.170.48,from=<support-renew@gandi.net>,to=<mgarber@bafirst.com>: 456 Address temporary unavailable.Dec 22 07:33:12 bafirst courieresmtpd:
started,ip=[207.111.170.48]
Dec 22 07:33:12 bafirst courieresmtpd:
error,relay=207.111.170.48,from=<jil.rollwitdvqj@o asismail.zzn.com>,to=<mgarber@bafirst.com>: 456 Address temporary
unavailable.
Dec 22 07:33:17 bafirst courieresmtpd: started,ip=[207.111.170.48]
Dec 22 07:33:17 bafirst courieresmtpd:
error,relay=207.111.170.48,from=<schoensee@buildin gapplications.com>,to=<mgarber@bafirst.com>: 456 Address temporary
unavailable.




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