From address doesn't meet the authentication requirements defined for the sender

[#1]

So why could I send, via the EE network from my plusnet email address but not from the same mobile phone using the same app and same email addrss when using my plus.net broadband connection. In both situations the settings for the app I use for email (gmail) are identical - so it is using the same incoming and outgoing settings. The only difference was when out the EE network provided data carriage and at home my broadband connection provided data carriage.

[#2]

So why could I send, via the EE network from my plusnet email address but not from the same mobile phone 

A really good question

The only difference was when out the EE network provided data carriage and at home my broadband connection provided data carriage.

Not quite, the public IP that you were submitting the email from, will be different. The email is still being sent, to the destination, by the plusnet server (relay.plus.net), so as you say, its effectively coming from the same source. The IP address from which you submit the email SHOULD be irrelevant to the receiver, but that information IS contained in the email headers...

[#3]

That is interesting. I thought the default for plus.net was a dynamic IP. So is there something common to all plus.net IPs that identify them as plus.net and so the email to Hotmail will always be stopprd?

[#4]

The default IS dynamic. All IP ranges are registered with IANA and so it is possible to check who owns the IP range.

However, as I said, the IP address from which you submit the email to the Plusnet smtp server, SHOULD be largely irrelevant to the final recipient.

[#5]

The cynic would suggest that it could just be BT finding a way to push users away from their 'value' Plusnet brand over to their 'premium' EE brand.

😈

[#6]

think that push has already started - noticed my pn fibre 900 at £44 quid is actually £5 cheaper through EE...

[#7]

My PN home IP is static, but when I send email from the phone away from home using my carrier O2's assigned dynamic IP, PN blocks my emails coz it suspects they're spam, since many O2 IPs must have been blacklisted

[#8]

Hi Tony,

This problem is becoming extremely frustrating.

I've been with Plusnet for 22 years and at that time, email was a fully supported part of the broadband service. As such I use it for numerous accounts and the thought of having to update all these accounts with a new email address is an extremely daunting, time consuming and fraught task. I am dealing with my fathers probate and this is becoming very difficult with these errors when sending emails.

Please provide an update on what Plusnet are doing regarding this.

thanks

Jason

[#9]

Hi totally agree with Jason. I have been with plusnet for well over 20 years. I have not chnaged becasue I have been happy with the broadband service and the email system. I do not awant to face the thought of having to change email address, there are literally hundreds of personal conatcts plus companies I deal with. However, if I have to change email provider then there is no longer a reason for me to stay with plusnet - I can shop the market. On principal, if I do change broadband provider then it will not be to EE or BT.

[#10]

---

@JaAm wrote:

Hi Tony,

...Please provide an update on what Plusnet are doing regarding this.

thanks

Jason

---

Explicitly tagging@plusnettony in case he didn't pick up on @JaAm's request for an update on this problem.

[#11]

Thanks for the detail of how to fix the problem.  BUT - where may one find the location of SPF, DKIM and DMARC and what should the correct values be for these characteristics.  The instruction/advice quoted from Microsoft does not answer thes points.  Please, can anyone at Plusnet or elsewhere advise on this question.  By accessing my Outlook mailer and Plusnet Webmail I cannot find details for these terms.  From Microsoft it looks like advice on what needs to be done to fix the problem but NO WHERE, HOW and TO WHAT - then real user advice will be given. 

[#12]

As per the advice given above, for *.plus.com email addresses, this is not a problem which an end user can fix.  The issue is with Plusnet's problem management team.

[#13]

I support entirely this sentiment - no change to a new E Mail provider and E Mail address.  For the thousands of Plusnet.com E Mail users who have not had problems before, like myself for c20 years, it is reasonable to look to and expect Plusnet to solve the current issue of E Mail bounce-back.

[#14]

Though very inconvenient, people need to understand that Microsoft are responsible for this issue, due to their (inappropriate) disposition that all *.plus.com users are a single email entity.

Plusnet email services have DKIM signatures implemented already, which is more than adequate, however Microsoft have enforced big email organisation rules onto these residential services.  Fixing this potentially requires a (largely transparent) configuration change to EVERY email customer.

This is not change to be rushed into.

[#15]

---

@Townman wrote:

...Microsoft have enforced big email organisation rules onto these residential services.  Fixing this potentially requires a (largely transparent) configuration change to EVERY email customer.

This is not change to be rushed into

---

Yes, we all know it's MS's fault but we all know MS aren't going to change their mind.  The sooner PN accept this and get on with making the necessary configuration change the sooner we can all use the PN email service again.

That PN are dragging their heels over this, I note that @plusnettony is not responding any more, strongly points to PN never fixing this.

Oh for the days when PN said, "We''ll do you proud".