The mailserver 550-5.7.1 (40.107.247.116) you are using is listed at 550-5.7.1 ix.dnsbl.manitu.net

Question

Hi Community,

when sending Emails to some of ours customers, these emails get blocked because the Email server 40.xx.xx.xx is blocked at ix.dnsbl.manitu.net

40.107.22.135

Please let us know how to remove the block.

Tanks you.

Best regards

Answer 1

Hi,@Stefan Lacheiner

Thanks for posting your question in the Microsoft Q&A forum.

It sounds like one of the IP addresses used by your email server is listed on a DNS-based Blackhole List (DNSBL) managed by Manitu.net.

Since manitu.net is not a Microsoft product, I can only provide some methods based on my personal experience:

I found the reason for this problem as below:

You can refer to this link for details:https://www.geekersdigest.com/suddenly-listed-on-ix-dnsbl-manitu-net-this-dnsbl-has-seized-its-operations/

Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information. 

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