Not receiving some hotmail emails

Question

Not receiving some hotmail emails

Nicolaas van Schalkwyk 20

Hello. Using hotmail email for years. On my laptop and on my phone, but I dont think it is the specific outlook app that is the issue.

Yesterday I received 6 emails, at 09:01, 10:06, 10:48, 12:42, 13:22 and 17:57.

Someone tried to email me at 12:47 and received the attached error. Not sure if attachment will show, so I am typing out the error they received:

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its recipients, This is a permanent error. The following address(es) failed:

******@hotmail.com (my email removed and replaced with generic)

host hotmail-

com.olc.protection.outlook.com [52.101.10.11]

SMTP error from remote mail server after pipelined sending data block:

550 5.7.1 Unfortunately, message from [41.222.34.197] werent sent. Please contact your ISP since part of their netword is on our block list (S3150)

You can also refer your provider to

http://mail.live.com/mail/troubleshooting.aspx3er (cant see rest of this due to how photo was sent to me)

And then there are more details below it also.

Then today I received an email at 08:48, 11:15, 12:18 and 12:20.

But another person contacted me to say their email bounced back to them today at 11:57.

So why would I receive some emails but not others?

Onedrive storage is at 82%, and email storage is at 40%.

0 comments

Answer accepted by question author

EmilyS726 264.1K Independent Advisor

The example you shared indicates the issue is on the sender’s side. It has nothing to do with your mailbox, and there is nothing you can do on your end to fix it.

The sender’s email server is using an IP address in a range that has seen a recent increase in abusive activity, such as spam or scams. That can damage the reputation of the IP range, and Microsoft may reject messages coming from it.

IP reputation works a lot like a credit score. It is very dynamic and changes based on the type and volume of activity associated with that IP range. If the reputation is poor, any receiving email server may reject incoming mail from it.

Please let the sender know so they can contact their own email service provider for support. Their provider will need to take action, such as tightening outbound spam filtering and addressing any abuse issues, to help restore the IP reputation. Once the reputation improves, the issue is typically resolved.

Nicolaas van Schalkwyk 20 Reputation points

2026-02-24T13:36:07.8266667+00:00

Hi. Thank you for the response. When it happened the first time yesterday I did advise the sender it is on their side, as that is what it looked like to me from reading the data. But when it happened a second time today from a completely different sender, I had to question it. It is worrying though, who else's emails am I not getting. Because the 2 emails were both sent from reputable service providers in our city. Will let them know anyways.
EmilyS726 264.1K Reputation points Independent Advisor

2026-02-24T13:49:59.2266667+00:00

If the second sender received the same bounce back, then it is the same issue.

Unfortunately, in today’s cyber environment, even reputable email service providers can run into this problem, including Microsoft’s own services. I am not sure if you have seen this before, but from time to time, Microsoft users may be unable to send PDF attachments or emails in HTML format. When that happens, it is often because Microsoft’s sending IPs have been targeted, and Microsoft has to tighten outbound spam filtering to protect and improve IP reputation.
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1 additional answer

Your answer

Nicolaas van Schalkwyk 20 Reputation points

2026-02-24T13:36:07.8266667+00:00

Hi. Thank you for the response. When it happened the first time yesterday I did advise the sender it is on their side, as that is what it looked like to me from reading the data. But when it happened a second time today from a completely different sender, I had to question it. It is worrying though, who else's emails am I not getting. Because the 2 emails were both sent from reputable service providers in our city. Will let them know anyways.
EmilyS726 264.1K Reputation points Independent Advisor

2026-02-24T13:49:59.2266667+00:00

If the second sender received the same bounce back, then it is the same issue.

Unfortunately, in today’s cyber environment, even reputable email service providers can run into this problem, including Microsoft’s own services. I am not sure if you have seen this before, but from time to time, Microsoft users may be unable to send PDF attachments or emails in HTML format. When that happens, it is often because Microsoft’s sending IPs have been targeted, and Microsoft has to tighten outbound spam filtering to protect and improve IP reputation.
Deleted

This comment has been deleted due to a violation of our Code of Conduct. The comment was manually reported or identified through automated detection before action was taken. Please refer to our Code of Conduct for more information.

Answer 1

It seems that you are experiencing issues with receiving some emails on your Hotmail account, while others are being delivered without problems. The error message you provided indicates that the sender's email was blocked due to their IP address being on a block list. This can happen for various reasons, including the sender's network being flagged for spam or other malicious activities.

Here are some potential reasons for the issue:

Sender's IP Blocked: The sender's IP address (in this case, [41.222.34.197]) is on a block list, which prevents their emails from being delivered to your inbox. You can suggest that the sender contact their Internet Service Provider (ISP) to resolve this issue.
Spam Filters: Emails may be filtered out by Hotmail's spam filters if they are suspected of being spam or if they contain certain content that triggers the filters.
Email Rules: Check if there are any rules set up in your Hotmail account that might be diverting or blocking certain emails.
Storage Limits: While your email storage is at 40%, ensure that you are not approaching any limits that might affect incoming emails.

To troubleshoot further, you can:

Ask the senders to check if their emails are being marked as spam.
Review your email rules and settings in Hotmail.
Consider running a message trace if you have access to that feature to see more details about the emails that are not being delivered.

If the issue persists, you may want to reach out to Microsoft support for additional assistance.

References: