On Fri, December 26, 2014 12:59, Mike Burger wrote:> On 2014-12-26 12:39 pm, Robert G. (Doc) Savage wrote:
>> I'm using fail2ban with CentOS 6.6. Something is causing
fail2ban's
>> alerts sent to root's mail to be rejected. Here's a clip from
one of
>> the
>> error messages:
>>
>>
>> Message 48:
>> From MAILER-DAEMON at lion.protogeek.org Sun Dec 21 03:09:20
2014
>> Return-Path: <MAILER-DAEMON at lion.protogeek.org>
>> Date: Sun, 21 Dec 2014 03:09:19 -0600
>> From: Mail Delivery Subsystem
>> <MAILER-DAEMON at lion.protogeek.org>
>> To: postmaster at lion.protogeek.org
>> Content-Type: multipart/report; report-type=delivery-status;
>>
boundary="sBL97EKS003880.1419152959/lion.protogeek.org"
>> Subject: Postmaster notify: see transcript for details
>> Auto-Submitted: auto-generated (postmaster-notification)
>> Status: R
>>
>> Part 1:
>>
>> The original message was received at Tue, 16 Dec 2014 03:09:17
>> -0600
>> from localhost
>> with id sBG97E83025627
>>
>> ----- The following addresses had permanent fatal errors
>> -----
>> <fail2ban at example.com>
>>
>> ----- Transcript of session follows -----
>> <fail2ban at example.com>... Deferred: Connection timed
out with
>> example.com.
>> Message could not be delivered for 5 days
>> Message will be deleted from queue
>> ..........
>>
>>
>>
>> I used to get the messages that are now being deleted after five days.
>> Any suggestions?
>
> I would suggest looking at the mailer daemon logs on both the sending
> and receiving systems. It would appear that the sending system is having
> difficulties at the receiving system end.
>
> You will likely find the root of your issues in the log entries for that
> message (or those messages) that occurred over the 5 days in question.
>
Just checking the obvious but can you confirm that you are not actually
sending messages to example.com?
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