Hi Richard Wakeford,
On Monday, June 06, 2005, you wrote:

> For the last couple of months I have started having problems with a
> couple of addresses where the mail is bounced back with the following
> message:

> <[EMAIL PROTECTED]>: host smtpin.ntlworld.com[212.250.162.8] said: 452
> Message rejected (in reply to end of DATA command)

452 means "insufficient system storage" per RFC 2821 (see section
4.2.2).  This could mean a couple of things.

 1) ntlworld.com need some help running mail servers and their drives
    are full on the incoming smtp service.
 2) the recipient you are sending mail to has filled up their
    allocated space.

As a side note to this, 4xx messages are non-fatal temporary errors.
This means that the sending SMTP service (wanadoo.fr I assume) should
be retrying the delivery of that message, but instead it is bouncing
it back. The RFC seems to allow a little bit of flexibility in this
section as it defines the 4xx message as temporary and says the
sending SMTP service "may" try again. This means that it's probably
optional to the sender if they want to resend. This would most likely
be the reason they are bouncing right back to you.

-- 
Jonathan Angliss
<[EMAIL PROTECTED]>

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