I have a list here at Hershey which has members being auto-deleted.
The error messages deals with MX sites:
    550 Unable to find A records for any MX sites
Does anyone have any suggestions:
1) What this message means.
2) Where I can look up this message.
Thanks in advance.
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John Clutcher, Systems Planning Specialist/E-mail Postmaster
Information Systems     Internet: [log in to unmask]
Hershey Medical Center    Bitnet: [log in to unmask]
P.O. Box 850               Voice: (717) 531-8682
Hershey, PA 17033  USA       FAX: (717) 531-6162
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>MSG From: MAILER  --PSUHMC   To: Zzzz Zzzzzzz <ZZZZ         +11/17/94 13:09:29
>Received: from PSUHMC.HMC.PSU.EDU by psuhmc.hmc.psu.edu (Mailer R2.08 R208004)
> with BSMTP id 6941; Thu, 17 Nov 94 13:09:28 EST
>Date:         Thu, 17 Nov 1994 13:09:29 -0500
>From:         BITNET list server at PSUHMC (1.8a) <[log in to unmask]>
>Subject:      ZZZZZZZZ: [log in to unmask] auto-deleted
>To:           Zzzz Zzzzzzz <[log in to unmask]>,
>              [log in to unmask]
>X-LSV-ListID: None
>
>The following users have been removed ("auto-deleted", in list owner jargon)
>from the ZZZZZZZZ list as a  result of the nondelivery error report enclosed
>below.  No action  is  required from  you;  this message  is  only for  your
>information.
>
>List of deleted users:
>
> [log in to unmask]
>
>------------------------ Nondelivery report (85 lines) ------------------------
>Received: from PSUVM.PSU.EDU by psuhmc.hmc.psu.edu (Mailer R2.08 R208004) with
> BSMTP id 6937; Thu, 17 Nov 94 13:08:15 EST
>Received: from PSUVM (NJE origin LST2SMTP@PSUVM) by PSUVM.PSU.EDU (LMail
> V1.2a/1.8a) with BSMTP id 4777; Thu, 17 Nov 1994 13:08:03 -0500
>Date: Thu, 17 Nov 94 13:08:02 EST
>From: <[log in to unmask]>
>To: <[log in to unmask]>
>Subject: Undeliverable Mail
>X-Report-Type: Nondelivery; boundary="> Error description:"
>
>This delivery error is in a special format that allows software like
>LISTSERV to automatically take action on incorrect addresses; you can
>safely ignore the numeric codes.
>
>Note: delivery error converted to LMail format at PSUVM.PSU.EDU.
>
>--> Error description:
>Error-For:  [log in to unmask]
>Error-Code: 3
>Error-Text: 550 Unable to find A records for any MX sites for the recipient hos
>.
>
>Error-End:  One error reported
>
>----------------- Original delivery error (before conversion) -----------------
>PSUVM.PSU.EDU unable to deliver following mail to recipient(s):
>    <[log in to unmask]>
>550 Unable to find A records for any MX sites for the recipient host.
>
>           ** Text of Mail follows **
>Received: from PSUVM.PSU.EDU by PSUVM.PSU.EDU (IBM VM SMTP V2R2)
>   with BSMTP id 8527; Thu, 17 Nov 94 13:07:40 EST
>Received: from PSUVM.PSU.EDU (NJE origin LISTSERV@PSUVM) by PSUVM.PSU.EDU (LMai
> V1.2a/1.8a) with BSMTP id 4717; Thu, 17 Nov 1994 13:07:39 -0500
>Date:         Thu, 17 Nov 1994 13:02:19 +0500
>Reply-To:     ZZZZZZZZZ ZZZZZZZZZZ ZZZZ <[log in to unmask]>
>Sender:       ZZZZZZZZZ ZZZZZZZZZZ ZZZZ <[log in to unmask]>
>From:         Barbara Patterson <[log in to unmask]>
>Subject:      New List Announcement
>To:           Multiple recipients of list ZZZZZZZZ
> <[log in to unmask]>
>
>**** Note Starts here ****