Hello,

On Wed, Dec 06, 2006 at 09:40:31AM +0000, Chris Lightfoot wrote:
> On Wed, Dec 06, 2006 at 09:28:12AM +0000, Philip Hazel wrote:
> > On Tue, 5 Dec 2006, Chris Lightfoot wrote:
> > 
> > > The classic example is errors indicating that the user's
> > > mailbox quota is overrun. This is of course a temporary
> > > error, not a permanent one, 
> > 
> > How do you know it is a temporary error?
> 
> Because a future attempt with the same sender, receiver
> and message data may succeed. RFC 2821:
> 
> |                                      A rule of thumb to determine
> |  whether a reply fits into the 4yz or the 5yz category (see below)
> |  is that replies are 4yz if they can be successful if repeated
> |  without any change in command form or in properties of the sender
> |  or receiver (that is, the command is repeated identically and the
> |  receiver does not put up a new implementation.)
> 
> `Over quota' is no more a permanent error than `disk full'
> or `load average too high'. It's certainly true that (a)
> the error condition could persist indefinitely, and (b) if
> it persists for too long the failing message should be
> returned to its sender, but that's a decision for the
> sender, not the recipient.

The decision whether a failure is temporary or permanent is not up to
you but up to the server that sends the response.

-- 
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Matthias Waffenschmidt |  Ruppmannstr. 27    |  fax +49 711 90074-33
[EMAIL PROTECTED]              |  D-70565 Stuttgart  |  http://www.lf.net

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