Returned mail: see transcript for details

Andrew Koch ak47 at
Mon Aug 5 14:10:38 UTC 2013

On Aug 4, 2013, at 23:07, Jimmy Hess <mysidia at> wrote:

> This was just received a flood of bounces reporting delivery failuers
> on messages I sent to [email protected] a few days ago...  Actually, I have just
> received a flood of about 15 messages just
> like this one around 9:00pm;  from various nanog posts I had sent 2 to
> 5 days in the past......
>   Is that strange or what?
> I thought the mailing list software rewrote the return path  to
> suppress bounces?
> On 8/4/13, MAILER-DAEMON at
> <MAILER-DAEMON at> wrote:
>> The original message was received at Mon, 5 Aug 2013 10:37:12 +0900 (JST)
>> from []
>>   ----- The following addresses had permanent fatal errors -----
>> <toshiya at>
>>    (reason: 550 5.1.1 <toshiya at>: Recipient
>> address rejected: User unknown in local recipient table)

The mailing list does try to receive and process bounce messages.

I cannot find this address in the NANOG mailing list as a subscriber. It appears that a subscriber is forwarding messages to this mailbox. 

Best Regards,
Andrew Koch
on behalf of the NANOG Communications Committee

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