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

Lordwotsit
Rising Star
Posts: 60
Thanks: 16
Fixes: 1
Registered: ‎24-11-2019

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

@stuck @MisterW   @plusnettony  et al

Domian, website & email on the move, and nowhere near Grungby Smiley

"Now is the time to say goodbye (goodbye)

Now is the time to yield a sigh (yield it, yield it)
Now is the time to wend our way-eee
Until we meet again, some sunny day
Goodbye, goodbye, we're leaving you, skiddlydye
Goodbye, we wish a fond goodbye, fa-ta-ta-ta-ta, fa-ta-ta-ta
Goodbye (goodbye), goodbye (goodbye), we're leaving you, skiddlydum
Goodbye, we wish a fond goodbye, la-la-ta-ta-ta
La da dah, lah la la
La dah da da dah, rhump te tump tum tum tum tump
You know, there comes a time in everyone's life
When they must say goodbye
That time is now, and so with tears in either eye, we say goodbye...."
 
If only there was real competition in utilities......
Cliff(Wotsit of Warwick)
“You will do foolish things, but do them with enthusiasm.” - Colette
redsox9
Pro
Posts: 306
Thanks: 129
Fixes: 4
Registered: ‎04-06-2016

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

@Lordwotsit 

Goodbye.  I don't know if you are making a foolish move but you are certainly doing it with enthusiasm.

 

 

Lordwotsit
Rising Star
Posts: 60
Thanks: 16
Fixes: 1
Registered: ‎24-11-2019

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

@redsox9 

Reckon I'd be more foolish to stay put and await transfer to Greenfly.

Cliff(Wotsit of Warwick)
“You will do foolish things, but do them with enthusiasm.” - Colette
Richard_R
Dabbler
Posts: 16
Thanks: 3
Registered: ‎22-06-2025

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

I had not realised that the migration was still happening (I was moved a few months ago) I wonder if they will ever finish. Since being migrated I have had 4 episodes of diarrhoea, when the entire contents of the server arrived in my POP3 account. And of course I have the common problems of MS bounces (and sometimes gmail too), and a random spam filter that even filters when it is turned off. 
Looking for a basic low cost email service that works and will not go out of business. 

jab1
The Full Monty
Posts: 23,565
Thanks: 8,354
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Registered: ‎24-02-2012

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

dgp
Rising Star
Posts: 167
Thanks: 25
Registered: ‎12-07-2007

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

Never had any problems with https://www.strato-hosting.co.uk/.
Richard_R
Dabbler
Posts: 16
Thanks: 3
Registered: ‎22-06-2025

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

Thank you both for your suggestions, am looking them up. 

I still find it hard to believe that Greenby could still be in business if all their customers have been receiving similar service. Oh well... 

john_chandler
Rising Star
Posts: 53
Thanks: 23
Fixes: 1
Registered: ‎09-06-2020

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

I might be wrong, but my understanding was that Greenby was set up specifically to deal with mail/hosting migrated from Plusnet. It's a division of Enix, who I thought had a good reputation but I'm starting to wonder. 

stuck
Pro
Posts: 381
Thanks: 185
Fixes: 4
Registered: ‎21-05-2009

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

@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?

MisterW
Superuser
Superuser
Posts: 19,277
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Registered: ‎30-07-2007

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

I'm sure people are aware and are trying to resolve the problem with Microsoft

Superusers are not staff, but they do have a direct line of communication into the business in order to raise issues, concerns and feedback from the community.

stuck
Pro
Posts: 381
Thanks: 185
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Registered: ‎21-05-2009

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


@MisterW wrote:

I'm sure people are aware...


I'm sure they are too but I'm asking for action not reassurance.  I'd like someone to ask, yet again, about what is being done and if it's ever going to get fixed.  I live in the vain hope that if the question is asked enough times something will change, since, "It's the squeaky wheel that gets the grease."

Adey1550
Newbie
Posts: 2
Registered: ‎06-11-2025

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

Hello Tony

This problem seems to have reappeared.  I have been trying to send simple emails from my IC24 mail account to my Microsoft (live.co.uk) outlook account and am getting rejection messages stating please contact your internet service provider since part of their network is on our block list (s3150).  As far as I’m aware, my account has not yet been migrated to Greenby as I have had not notification in respect of this.  Can you please help?

 

The following is the exact text of the rejection message

 

Reporting-MTA: dns; avasout-peh-004 [84.93.238.90]
Received-From-MTA: dns; mail.enmail.co [91.204.208.8]
Arrival-Date: Tue, 28 Apr 2026 12:04:22 +0100



Final-recipient: rfc822; @live.co.uk
Diagnostic-Code: smtp; 550 5.7.1 Unfortunately, messages from [212.159.14.20] 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=11BD42CB062136C9] [DU6PEPF0000A7DD.eurprd02.prod.outlook.com 2026-04-28T11:04:22.468Z 08DEA16588546E03]

Last-attempt-Date: Tue, 28 Apr 2026 12:04:22 +0100

Adey1550
Newbie
Posts: 2
Registered: ‎06-11-2025

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

Hello Tony

This problem seems to have reappeared.  I have been trying to send simple emails from my IC24 mail account to my Microsoft (live.co.uk) outlook account and am getting rejection messages stating please contact your internet service provider since part of their network is on our block list (s3150).  As far as I’m aware, my account has not yet been migrated to Greenby as I have had not notification in respect of this.  Can you please help with the email problem also, do you have any information as to when my email will be migrated?

The following is the exact text of the rejection message

 

Reporting-MTA: dns; avasout-peh-004 [84.93.238.90]
Received-From-MTA: dns; mail.enmail.co [91.204.208.8]
Arrival-Date: Tue, 28 Apr 2026 12:04:22 +0100



Final-recipient: rfc822; @live.co.uk
Diagnostic-Code: smtp; 550 5.7.1 Unfortunately, messages from [212.159.14.20] 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=11BD42CB062136C9] [DU6PEPF0000A7DD.eurprd02.prod.outlook.com 2026-04-28T11:04:22.468Z 08DEA16588546E03]

Last-attempt-Date: Tue, 28 Apr 2026 12:04:22 +0100

pvmb
Seasoned Pro
Posts: 1,304
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Registered: ‎12-02-2014

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

plusnettony
Plusnet Help Team
Plusnet Help Team
Posts: 3,006
Thanks: 1,317
Fixes: 55
Registered: ‎24-07-2014

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

Remind me of your from address (by private message) please and I'll take a closer look. 

 

 

If this post resolved your issue please click the 'This fixed my problem' button
 Tony T
 Plusnet Help Team