Plusnet mail being blocked by Hotmail? :-(

[#1]

Just recieved this after mailing a friend this evening:

"A message that you sent to the following recipient could not be delivered due to a permanent error. ** The remote server 65.54.188.126 responded with: ** xxxxxxxx@hotmail.com 550:SC-002 (BAY004-MC4F25) Unfortunately, messages from 84.93.230.250 weren't sent. Please contact your Internet service provider since part of their network is on our block list. You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors. This message was created automatically by mail delivery software on the server avasout05."

Has always worked before this so I assume (as in the past) Hotmial has got its undergarments in a tizzy over mails from PN. Can PN resolve please? And how long will it take?

TIA,

Ray.

[#2]

Not just you... Presumably a compromised machine on Plusnet is sending out malware or spam.

It would be nice if Plusnet could be a bit more attentive to issues like this - no doubt many users inconvenienced.

------------------------------

A message that you sent to the following recipient could not be delivered due to a permanent error. ** The remote server 104.44.194.233 responded with: ** XXXXX@hotmail.com 550:SC-002 (SNT004-MC7F12) Unfortunately, messages from 84.93.230.250 weren't sent. Please contact your Internet service provider since part of their network is on our block list. You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors. This message was created automatically by mail delivery software on the server avasout05.

[#3]

I replied to a similar thread over here - https://community.plus.net/t5/Email/Plusnet-mail-server-blacklisted/m-p/1478600#M20964
When posting that reply, I attempted delisting, however a delisting address I found bounced and as yet I've had no response from their web form.
Edit: Tried again and have now managed to raise a support request with Microsoft (ref: 1398757264).

[#4]

Moderators Note.

topic locked in favour of linked thread.