Hotmail rejecting mail from PN [Diagnostic-Code: smtp; 550 5.7.1]

[#1]

Replying to whoever above me but I just tried to send an email to someone with a hotmail account and got the dreaded

"

Diagnostic-Code: smtp; 550 5.7.1 Unfortunately, messages from [212.159.14.XX] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3140).

"

(Removed part of IP just in case).

This has been going on for MONTHS now intermittently? I've mentioned it myself on the forum and there have been so many othe compalints.. Can it just not be solved?

[#2]

It seems not, which is why (after 18 years with Plusnet) I have got a new email provider. Yes, it's costing me money but it's worth every penny as I can now send messages to MS addresses without error.

[#3]

@plusnettony, @Townman, @MisterW
A closing note from me, the OP of this topic. If you read the post before this one you will see that I've given up on PN email.
I'm still in the process of letting my contacts know of my change of email address, and am likely to doing that for a while yet, but it's worth all that hassle to once again have an email system that works without error.

[#4]

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@stuck wrote:

@MisterW Sending to Outlook is still broken:

Diagnostic-Code: smtp; 550 5.7.1 Unfortunately, messages from [84.93.230.227] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3150)

Any chance you can poke someone to get more details?

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Whois IP 84.93.230.227

"BT" 😊

Perhaps the question is (or should be?): Who is in charge here?

If not Greenby (IMO it frequently isn't), then Plusnet or BT?