Our Mailserver was blocked by Microsoft [on our block list S3150]

Andreas Zeng · 2. November 2022

Hi there,we can´t send Mails to different Microsoft domains like live.com hotmail.com an so on.The reply is:This is the mail system at host mx1.hal-jw.de. I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below. For further assistance, please send mail to postmaster. If you do so, please include this problem report. You can delete your own text from the attached returned message. The mail system <elli-dockhorn>: host eur.olc.protection.outlook.com[104.47.14.33] said: 550 5.7.1 Unfortunately, messages from [80.64.187.35] were

PetrusMaximusWT

This answer is so ridiculosly stupid, it seems like you don't understand the problem at all.
It is Microsoft that is blocking OP's IP address not his ISP.
Best way to mitigate this problem is to advise customers not to use live.com, hotmail.com and outlook.com mail adresses.
I have the same problem for years and can not solve is since the outlook-delivery-team is very useless.

Janbaz Salehi

Hello Andreas! My name is Janbaz, and I am an Independent Advisor as well as a long-time Microsoft user. I'm sorry that you are experiencing this issue, and I am hopeful that I will be able to help you find a satisfactory solution.

Dear Andreas, Internet service providers (ISPs) consider every spam complaint to be an official complaint from their customers. This means that if enough recipients mark your email as spam, the ISP may respond by blocking future emails from you.

https://support.microsoft.com/contactus

1. https://support.microsoft.com/en-us/office/bloc...

Please let me know if this doesn't work or if you need further assistance.

Warm Regards,

Janbaz

steve1da

Hola,
 der Grund steht doch da:
 Please contact your Internet service provider since part of their network is on our block list (S3150)
 Die IP steht auf einer Block Liste und muss wieder freigegeben werden.
 https://answers.microsoft.com/en-us/outlook_com/forum/all/since-part-of-their-network-is-on-our-block-list/d956ad0e-3019-4440-bbb1-15693d66e438
 Gruß,

PetrusMaximusWT

I filled out this stupid form for at least 5 times, every time my IP gets white listed, only to be blocked again in a few months.

Like I said, I am looking for a permanent fix, this useless support form you are talking about, is definitely not a permanent solution.

Greetings, Peter.

PetrusMaximusWT

Hey Rhaine,

in my question I already stated that I am using your useless SNDS online tool. I submited the IP adresses a long time ago and there is no problem with them. SNDS says:
All of the specified IPs have normal status. But still, I am on a block list. It seems to me SNDS has no effect on IP reputation.

Is there a way to solve this problem permanently? Like I said this block list **** is happening on a regular basis. And outlook.com is the only mail service provider that is blocking my IP. My IPs have never been on a black list. Outlook.com sucks
big time!

Hi,

willkommen im Windows Forum!

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Our Mailserver was blocked by Microsoft [on our block list S3150]

Our Mailserver was blocked by Microsoft [on our block list S3150]

Our Mailserver was blocked by Microsoft [on our block list (S3150)]

Our Mailserver was blocked by Microsoft [on our block list (S3150)]

Kunden können auf meine eMails nicht antworten

network is on our block list (S3150)

network is on our block list (S3150)

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Our Mailserver was blocked by Microsoft [on our block list S3150] - Outlook.com

Our Mailserver was blocked by Microsoft [on our block list S3150] - Similar Threads - Our Mailserver blocked

network is on block list S3150.

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E-Mails an Outlook-Adressen werden abgewiesen: "network on our block list"

Our Mailserver was blocked by Microsoft [on our block list S3150] solved