Greetings,

as I already mentioned in my last message, my Zoho IP has been blocked by Hotmail for more than 15 days. Although someone said that the issue was "solved," it still isn't, and this amount of time seems neither normal for a "serious" company, nor do I see that they actually care about their customers.

I expected much more from Zoho.

I continue providing details of the problem below:

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message/delivery-status
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Reporting-MTA: dns; mx.zohomail.eu
Arrival-Date: Wed, 03 Dec 2025 16:40:37 +0000

Original-Recipient: rfc822; [redacted]@hotmail.com
Final-Recipient: rfc822; [redacted]@hotmail.com
Status: 550
Action: failed
Last-Attempt-Date: 5 Dec 2025 00:26:46 GMT
Diagnostic-Code: 5.7.1 Unfortunately, messages from [136.143.171.17] 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 http://mail.live.com/mail/troubleshooting.aspx#errors. [Name=Protocol Filter Agent][AGT=PFA][MxId=11BC5D13053D32A4] [AM3PEPF00009B9C.eurprd04.prod.outlook.com 2025-12-05T00:26:46.401Z 08DE2E898C7440C5]
Remote-MTA: dns; hotmail-com.olc.protection.outlook.com