SuneR

We are in the process of getting a good mail reputation with hotmail.com, and
hotmail.com wants us to stop sending them mail if they send us a 421 smtp
code. That means we reached the limit, and that we should stop further
sending to avoid getting a negative rep for that delivery.

I am already looking into a solution with rules on an Exchange 2007 Edge
Transport server, but so far no luck. But because I figure that no matter
what, Powershell is a good approach to stop the mails from being sent to
hotmail, that is why I ask here.

What I have in mind is something like this:

Make a powershell script that parses the logfile at intervals, and if it
finds an smtp code 421 from hotmail, it will simply stop the smtp service on
the server, I know that this means that mail to all other domains will be
stopped also, but stopping mail to hotmail is top priority in this process,
so a solution where the script stops the outgoing queue or enables a filter
to stop outgoing mail to hotmail would be better but I dont know if thats
easier/possible.

However, I am not skilled enough to make this script without help - and I
dont even know if this is a usable solution. So if anyone can give me some
tips, a script that can do some or all of what I am looking for I would be
very grateful!

I know this is not an Exchange forum, but if someone knows about Exchange
and knows of a better way to solve this, I am also very interested in
learning more about it.