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From: mw on 27 Apr 2010 09:36
If you select the block recipients sent to recipients not listed in Global
Address List should that block any emails addresses to our server where there
is not a legitimate email account in our global address list?

So is abc(a)abc.com does not exist or no longer works here it would block the
email?

"Rich Matheisen [MVP]" wrote:

> On Fri, 23 Apr 2010 15:45:01 -0700, mw <mw(a)discussions.microsoft.com>
> wrote:
>
> >Users on our exchange server 2007 cannot send email to hotmail or windows
> >live accounts. We get the following message.
> >
> >SNT0-MC1-F42.Snt0.hotmail.com #550 SC-002 Mail rejected by Windows Live
> >Hotmail for policy reasons. The mail server IP connecting to Windows Live
> >Hotmail has exhibited namespace mining behavior. If you are not an
> >email/network admin please contact your E-mail/Internet Service Provider for
> >help. Email/network admins, please visit http://postmaster.live.com for email
> >delivery information and support ##
>
> I suppose that could mean that you've sent too many undeliverable
> messages to addresses at those domains. Or it might be that your
> server is being exploited to send junk e-mail to addresses that don't
> exist in those domains.
>
> Do you reject RCPT TO commands with addresses that don't exist in your
> domain (i.e. have you enabled recipient filtering)?
> ---
> Rich Matheisen
> MCSE+I, Exchange MVP
> .
>
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