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SMTP Crazyness - Microsoft Exchange

SMTP Crazyness - Microsoft Exchange

SMTP Crazyness

Posted: 09 Sep 2004 07:27 AM PDT

In article <414180fd$iglou.com>, "PES" <NO*SPAMpestewartREMOVE*netSPAM*SUCKS> wrote: 

This is true. But of course they can ALSO probe for valid addresses if they
know you return NDRs by having the return address be an actual, valid
mailbox. They can then compare the NDRs it does and does not receive from
your domain against a record of addresses they sent to your domain.

So to me, this is not a compelling argument for NDRs over 550 rejects.

Making the case for using 550 rejects instead of NDRs, if the spammer forges
their domain (likely, as we all know), then it ends up being your site that
ends up sending tons of mail to that poor domain. But if your server simply
returned a 550 for invalid recipients, one of two things will occur.

First and best, if it's a specialized spam program, usually it'll just drop
the message right then and there. Or, if they've managed to use someone
else's SMTP relay, that relay will probably generate an NDR itself. But, the
NDR will *NOT* be from your server.

There are folks who WILL end up blocking ANY email from you if they end up
receiving tons of NDRs from you due using NDRs instead of 550 rejects.

IMO, going the 550 route is better for both your site and the Internet at
large.

Exchange 5.5 and Windows 2003

Posted: 08 Sep 2004 08:57 AM PDT

Great!
Do I need to install the AD Connector to allow Ex. to
function in Active Dir?
 

Exchange Services not starting

Posted: 08 Sep 2004 06:22 AM PDT

Please post KB or hotfix number

Thanks,
Steve

"Melissa Travers [MSFT]" <microsoft.com> wrote in message news:<phx.gbl>... 

W2k + Exchange 5.5 --> W2k3 + E2k3 Recommended Upgrade Path?

Posted: 07 Sep 2004 12:34 PM PDT

No I'm not talking about ADAM. In Windows 2000, Exchange was
installed in a domain partition of the AD and therefore there are
trust considerations when crossing domain boundaries. From what I've
heard, in 2003 it is installed in an application partition (like DNS
is) with a forest wide scope.

Jason


"Glen Trafford" <com.No.Spam> wrote in message news:<413e55bf$1@info-mid>...