Brian,
where did the failure message come from? was it generated locally? It
appears that the IP address your (current) e-mail was sent from is on an
RBL: http://www.dnsbl.au.sorbs.net/cgi-bin/db
A possible explanation follows, which may be of use to some of the
group, judicious use of the delete key may be in order ;) please contact
me offlist if anything doesn't make sense, or if you need some pointers
to getting your (fixed) IP off this blacklist (which may not help!!).
Employers (& network providers) are finding the need to control SPAM, &
these lists are often used as a 'first line of defence', the e-mail
service policy says "if the connection comes from one of these IP
addresses, reject the connection outright".
How these lists are compiled: as a result of the proliferation of SPAM,
a number of 'community minded organisations' have developed lists which
are known as RBL's (Real-time Black Lists), & ORL's (Open Relay Lists).
These are lists of IP (Internet Protocol) addresses which are known to
be:
1) sources of email SPAM;
2) Open e-mail relays (mis-configured email transfer agents (MTA's) that
allow anybody's email client (Mail User Agent or MUA) or other MTA's to
connect & deliver an email to an email address that is not on it's
local/authorised domain - which it will then happily forward) which can
used by SPAMmers to deliver huge amounts of e-mail by specifying huge
recipient lists for one email (abuse of the relayer's bandwidth);
3) or, used for residential dial-up/broadband/cable services -
generally dynamically assigned to users on a 'per-connection' basis, &
it's unlikely one will get the same IP address next time one connects.
Therefore one shouldn't receive or send e-mail directly via this
address, but should deliver or receive from an e-mail host on the ISP's
network. Typically SPAMmers ignore this restriction- this is why some
ISPs are now blocking mail outbound from their dialup IP's to anywhere
but their mail servers.
davidt
On Wed, Sep 29, 2004 at 03:18:45PM +1200, Brian Swale wrote:
>
> Hi folks
>
> I e-mailed Gordon Ross privately at Gordon Ross <gordross@xxxxxxx>
>
> and it bounced. Yet the OM digest has you mail Gordon so somebody's
> getting through.
>
> Here's the message I got. ..................
> ----- The following addresses had permanent fatal errors -----
> <gordross@xxxxxxx>
>
> ----- Transcript of session follows -----
> 451 4.4.1 reply: read error from idcmail.shaw.ca.
> 451 4.4.1 reply: read error from idcmail-mx1so.cg.shawcable.net.
> <gordross@xxxxxxx>... Deferred: Connection reset by
> idcmail-mx1so.cg.shawcable.net. Message could not be delivered for 5 days
> Message will be deleted from queue
> .......
>
> Brian
>
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