Courier Mail Server

you should not reject the mail immediately, it makes sense to retry the
delivery when a user is over quota. On a postfix system you can use the
following parameter to limit the queue lifetime of a message:

maximal_queue_lifetime (default: 5d)

    The maximal time a message is queued before it is sent back as
undeliverable.

    Time units: s (seconds), m (minutes), h (hours), d (days), w (weeks).
The default time unit is d (days).

    Specify 0 when mail delivery should be tried only once.


Regards,

Andre

-----Original Message-----
From: courier-maildrop-bounces@...
[mailto:courier-maildrop-bounces@...] On Behalf Of
sosogh@...
Sent: Monday, February 25, 2008 8:41 AM
To: courier-maildrop
Subject: [maildropl] when maildir over quota

Hi list

I am using debian etch
The maildrop at my system is installed via apt-get 

When maildrop deliver mails to one person whose quota is over ,it defer the
delivery instead of bouce it .(see the following log)

How can i set maildrop  bouce the mail instead of defer it when  one person
whose quota is over

Jan 22 05:33:06 Mail postfix/pipe[13842]: 5B52D1C2C0:
to=<sosogh@...>, relay=maildrop, delay=1811, delays=1811/0.14/0/0.22,
dsn=4.3.0, status=deferred (temporary failure. Command output: maildrop:
maildir over quota. )
	
Mail:~# maildrop  -v
maildrop 2.0.2 Copyright 1998-2005 Double Precision, Inc.
GDBM extensions enabled.
Courier Authentication Library extension enabled.
Maildir quota extension enabled.
This program is distributed under the terms of the GNU General Public
License. See COPYING for additional information.

Any advise is appreciated 



   BEST REGARDS!
 				
*********************
 sosogh@...
 2008-02-25
*********************

André Mamitzsch <andre@...> writes:

> you should not reject the mail immediately, it makes sense to retry the
> delivery when a user is over quota. 

This is true in many cases, however if you have a large number of users,
which means a certain percentage of those are over quota at all times,
then your deferred queue gets quite big and can overload the queuing
mechanism and cause a lot of problems.

In this scenario, we found we had to reject on over-quota immediately,
but the user gets notificatons via email when they are getting close
to over-quota situations, so that they can respond before that
happens. This has the added side-benefit that people sending messages
dont think that the receiver has received their message for 5 days and
then suddenly gets a response, instead bouncing right away you get
some sort of status indication.

> On a postfix system you can use the
> following parameter to limit the queue lifetime of a message:
>
> maximal_queue_lifetime (default: 5d)
[snip]
>     Specify 0 when mail delivery should be tried only once.

I wouldn't do this as a substitute because then you are going to
bounce all mail that gets deferred, no matter if its due to over
quota, or because some subsystem is offline temporarily. 

Micah

micah writes:

> André Mamitzsch <andre@...> writes:
> 
>> you should not reject the mail immediately, it makes sense to retry the
>> delivery when a user is over quota. 
> 
> This is true in many cases, however if you have a large number of users,
> which means a certain percentage of those are over quota at all times,
> then your deferred queue gets quite big and can overload the queuing
> mechanism and cause a lot of problems.

Not with the current version of Courier. After the first message gets 
deferred, Courier refuses to accept any mail for the recipient, with a 
temporary 4xx error code, until this is resolved.

The end result is that if the user fixes the overquota situation quickly 
enough, no mail gets lost.