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[address@concealed]

Hello,
I'm getting this strange error when sending mail to
address@concealed. It's something like this:

-------------------------------------------------------------
   ----- The following addresses had permanent fatal errors -----
"|/home/sympa/bin/queue ngo-subscribe"
    (expanded from: <address@concealed>)

   ----- Transcript of session follows -----
sh: queue not available for sendmail programs
554 "|/home/sympa/bin/queue ngo-subscribe"... Service unavailable

    [ Part 2: "Delivery Status" ]


Reporting-MTA: dns; contact.md
Received-From-MTA: DNS; moldnet.md
Arrival-Date: Thu, 18 Nov 1999 17:12:37 +0200

Final-Recipient: RFC822; <address@concealed>
X-Actual-Recipient: RFC822; |/home/sympa/bin/queue
address@concealed
Action: failed
Status: 5.5.0
Last-Attempt-Date: Thu, 18 Nov 1999 17:12:37 +0200


    [ Part 3: "Included Message" ]

Date: Thu, 18 Nov 1999 17:13:27 +0200 (EET)
From: Eugen A. Onoi <address@concealed>
To: address@concealed
Subject: subscribe ngo

------------------------------------------------------
Please mail me if somebody knows where the problem can be.
Thanks in advance.

Eugen