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Plusnet SMTP IP 212.159.14.17 blocklisted by Microsoft (S3140) – needs delisting

pvmb
Seasoned Pro
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Registered: ‎12-02-2014

Re: Plusnet SMTP IP 212.159.14.17 blocklisted by Microsoft (S3140) – needs delisting

...I suspected something like that but, as I am not using client email programs, I am not up on what all the correct settings, and credentials, need to be. I get the impression from posts around here many users of said programs don't know - or understand - either! Consequently they are taking the simple approach: Blame it all on Greenby.

I, and presumably others, know that the Greenby email system does work. That doesn't mean there have not been some bumps and glitches along the way - it wasn't all as completely seamless as Plusnet suggested it would be but, for straightforward, simple Plusnet email users it was simple enough. Might be genuine complications for people with other, or more complicated, email setups.

It's also possible that coincidence has come into play - many have been complaining of increasing Spam before the transfer to Greenby, plus users of other ISPs (e.g. Zen) have also recently been having issues with getting emails through to certain destinations. I reckon these are likely Spam related problems.

But then, I've also seen people on this BB bitterly complaining about getting Spam to their QUOTED email address... They get Spam?! Whatever next? Will they be accusing The Pope of being a Catholic? 🤣

jab1
The Full Monty
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Re: Plusnet SMTP IP 212.159.14.17 blocklisted by Microsoft (S3140) – needs delisting


@pvmb wrote:

 

It's also possible that coincidence has come into play - many have been complaining of increasing Spam before the transfer to Greenby, plus users of other ISPs (e.g. Zen) have also recently been having issues with getting emails through to certain destinations. I reckon these are likely Spam related problems.

Although I don't use the Zen email facility - got caught in their decision to end it for 'new' users - I am not aware of complaints.

I use a client program for mail, my setup is not exactly 'standard', but apart from a reluctance to start cleanly, I have no issues with my migrated service.

John
pvmb
Seasoned Pro
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Re: Plusnet SMTP IP 212.159.14.17 blocklisted by Microsoft (S3140) – needs delisting

Microsoft Domain Blacklist Causes Email Problems for UK ISP Zen Internet
Thursday, Mar 19th, 2026 

https://www.ispreview.co.uk/index.php/2026/03/microsoft-domain-blacklist-causes-email-problems-for-u...

redsox9
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Re: Plusnet SMTP IP 212.159.14.17 blocklisted by Microsoft (S3140) – needs delisting

@abitpedantic  wrote: The expectation (i.e. official recommendation) is that relay.plus.net (which translates to 212.159.14.17 amongst others) is used but there's nothing to stop you specifying mail.enmail.co instead.

Which one will get us through the blacklists of iCloud, me.com, msn.com, hotmail etc., avoiding spam in the process?

abitpedantic
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Re: Plusnet SMTP IP 212.159.14.17 blocklisted by Microsoft (S3140) – needs delisting

It needs someone who uses both methods to say what works. I only use mail.enmail.co and recently:

a) I've had no trouble reaching hotmail and other MS-owned addresses

b) All my attempts to reach gmail addresses were being bounced but this morning a couple of emails were delivered instantly

c) No joy for ages with icloud (Diagnostic-Code: smtp; 554 5.7.1 [BS01] Message rejected due to local policy)

Of course, everything is so ridiculously unpredictable that tomorrow I could be writing a completely different list.