IP blocked by Outlook

Question

Hello,

Messages sent from our mailserver is blocked by Outlook because they block the IP range it's in. We've asked them to unblock our specific IP, but it looks like they can not do that. How can we solve this? Can you contact Outlook (see their message below)? Do you offer virgin IPv4 IPs that never have been abused or could we run our mail server on IPv6-only so this won't happen again? We don't send out mail to a general audience and our domain name has never been blacklisted.

An error message from Outlook:

"Unfortunately, messages from [........112.147] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3140)."

Thank you so much for your help.

Accepted Answer

Thank you, Rian!

I also contacted Outlook and they solved it for me there:

Hello, My name is xxxx and I work with the Outlook.com Deliverability Support Team. We have implemented mitigation for your IP(s): xxxx; xxxx and this process may take 24 - 48 hours to replicate completely throughout our system. Sincerely, xxxx Outlook.com Deliverability Support.

Answer

Hi,

Only AWS support will be able to do something about this. If you logged into your AWS console you can connect support via the support page: https://support.console.aws.amazon.com/support/

IP blocked by Outlook

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