Hi Users of the SWINOG anti-spam blocklists.
At the moment, various Microsoft IP addresses are in a similar state as this one:
https://blacklist.imp.ch/entry.php?id=1.0.8.0.0.0.0.0.0.0.0.0.0.0.0.0.2.1.e....
Unfortunately, Microsoft has confirmed to me, they use the same bunch of SMTP 'outbound' ip address for customer in similar regions.
This is now affecting MSN customer and businesses using Office365.
abuse@microsoft.com is /dev/null (or mailbox full, depending on their mood) as usual. I'm trying to persuade affected business Office365 customer to escalate this issue within Microsoft Switzerland Management. I also have a contact there to which I repeatedly feed those complaints, without success so far.
I am aware, Microsoft Office365 customer service blames this on us 'falsely and for no reason' blocking email from those ip addresses, and when presented with Evidence of what happened, they close the case with 'issue solved' which was never the case.
Mit freundlichen Grüssen
-Benoît Panizzon-