[Dovecot] Unexplained MDA bounce backs

[Dean Manners]

I have recently noticed that some of our internal mailer scripts are causing
Dovecot-LDA to generate Mailer Delivery Subsystem messages.  The following
Dovecot-LDA message is generated:


 Message body 
Your message was automatically rejected by Dovecot Mail Delivery Agent.
The following reason was given:
Unknown error
 Message body 

 Message header 
Return-Path: MAILER-DAEMON
Delivered-To: [EMAIL PROTECTED]
Received: by mymachine.x (Postfix, from userid 5000)
id 5772568300; Mon, 14 Jan 2008 18:00:56 +1100 (EST)
Message-ID: [EMAIL PROTECTED]
Date: Mon, 14 Jan 2008 18:00:55 +1100
From: Mail Delivery Subsystem [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
MIME-Version: 1.0
Content-Type: multipart/report; report-type=disposition-notification;
boundary=21506/mailfilter02
Subject: Automatically rejected mail
Auto-Submitted: auto-replied (rejected)
Precedence: bulk
 Message header 


Initially I thought these were being caused by Delivery-Receipt requests,
however have since tested this and is not the case.  I have tried to snoop
through the logs (unfortunately on a very busy mail hub) using the
Message-ID, however this doesn't seem to lead me back to the original
message - only the MDA notification.  I can only ascertain that its isolated
to our scripts, as the bounces@ address is specifically used by them.

Any ideas what would cause/trigger the Unknown error automatic rejects ?

System config is
-Postfix 2.3.4 with MySQL backend
-Dovecot 1.0.rc26 with MySQL backend, using only deliver.

All mail deliveries are otherwise fine.

Regards
__ 
Dean Manners

Re: [Dovecot] removing old emails

[Dean Manners]

Ray,
We do this, deleting spam filtered messages older than 21 days. We
also delete the index's and let Dovecot re-generate them. Have had no
problems with this method for 4 months.

Regards
__ 
Dean Manners

 -Original Message-
 From: [EMAIL PROTECTED] 
 [mailto:[EMAIL PROTECTED] On Behalf Of Ray
 Sent: Thursday, May 10, 2007 7:56 AM
 To: dovecot@dovecot.org
 Subject: [Dovecot] removing old emails
 
 Hello,
 I need to remove mail older than for example 30 days. Email 
 is stored in maildir format. can I just use a cron job and 
 shell script or will that mess up indexs?
 Thanks
 Ray
 

Re: [Dovecot] v1.1 plans

[Dean Manners]

 I want to update index file handling to use less locks and 
 update dovecot.index file less often. The file formats would 
 still stay backwards compatible with v1.0. After this I'm 
 hoping to get index files working well with NFS even with 
 attribute cache enabled.

Music to my ears - as im sure with many other NFS sites.


Regards
__ 
Dean Manners