On 22/08/2019 16:08, Benoit Panizzon via mailop wrote:
One of our mail platform IP has once more been hit by an outlook.com
blocking:
host outlook-com.olc.protection.outlook.com[104.47.4.33] said: 550 5.7.1
Unfortunately, messages from [157.161.12.116] weren't sent. Please contact
your Internet service provider since part of their network is on our block
list (S3150). You can also refer your provider to
It's probably the "bad neighbour" problem
You may not have been spamming, but Microsoft have seen lots of spam
from rest of the 157.161.0.0/16 network which your IP address is in. So,
Microsoft have decided to block the entire block, which includes you.
If you contact the Outlook.com team they may be able to put an exception
in for your IP address. (They've done that in the past for us, but not
every time).
https://support.microsoft.com/en-us/supportrequestform/8ad563e3-288e-2a61-8122-3ba03d6b8d75
Alternatively, change your hosting company to one which takes more care
to stop spammers using their servers/network.
--
Paul Smith Computer Services
Tel: 01484 855800
Vat No: GB 685 6987 53
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