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

[#1]

I have just sent an e-mail to an address that forwards to my Plusnet account and it worked fine.

[#2]

Sorry to revive what I thought was a solved issue, but the gap between 'sent' and 'received' is growing again!!

[#3]

For what it's worth I've not had a failure in forwarded email to plusnet since the afternoon of 24/10, 23/10 was when I had lots of failures.

[#4]

I'm getting the  emails, @Kwak  - but with varying gaps between the sent and received times.

[#5]

I had hoped that someone from Plusnet's technical team would have posted in this thread to explain what happened and what's been implemented to rectify it.

As with the other thread concerning Microsoft domains, the lack of Plusnet's engagement is very poor!

[#6]

@ebforum From my examination of the headers of 'delayed' messages, there are additional security/validation checks being made. and it appears these are impacting the delivery.

[#7]

@jab1 , if that's the case then, with hardware not being a major cost consideration, I would expect Plusnet/Greenby to implement whatever upgrades are necessary to ensure that customers who are weary from recent e-mail problems are not further impacted upon.

[#8]

What you expect, @ebforum , and what happens may not be the same.  Not being involved with either PN or Greenby, except as a mail-only customer, complaining to me is pointless.

[#9]

I'm not complaining to you @jab1 which is why I said "I would expect Plusnet/Greenby to implement.....". I was making a statement in relation to your last post. I live in hope of a member of the Plusnet team to look at threads like this and see where the frustration is building with their lack of response.

[#10]

Fair enough @ebforum  - but we are dealing with BT, where the customer, or their frustrations, are the last thing on their minds.

[#11]

Just had a report of another forwarding failure to plusnet, same as a few days ago.

Problem communicating with the recipient server

[#12]

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@Kwak wrote:

... another forwarding failure to plusnet ...

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Subtle detail - can you please clarify, is this inbound email sent DIRECT to your Plusnet email address, or email sent to a third party (for example a domain name hosting operation) who forwards those emails to your Plusnet email account?

Such adds no end of complications; why not just access those emails on your domain name hosting service's own email platform?

[#13]

It's to a domain that goes to an email provider (zoho who are quite big) that is then forwarded to plusnet.

I can separately look at the original email provider but I've always just had everything forwarded to plusnet so I have emails in one place. I did this before I had a separate email provider using direct domain forwarding but I've just kept everything way it was. It's not normally an issue. While I've a workaround (looking at original provider) the reason I'm commenting here is .. well just as there appears to be an issue at plusnet, and it's good people know about issues. Like this guy has a delay issue?

I actually have an advantage here in that I can SEE there is a problem with email getting do plusnet due to the intermediate server I can see the status of, if this is happening to other people with direct emails, then they may not know? 

Unless the problem is at the forwarding end but .. While most of the errors have been a bit vague there was one about the server reporting running out of sockets that was strangely specific as plusnet server issue.

Anyway .. Sounds like plusnet email is having a big switcheroo and I may have to pay for emails at some point, so at that point I'll maybe make say Zoho (or another) my main email provider but .. anyway as I say there seems to be an issue, or I'm getting told there is anyway.

(I was caught out a month or so ago with the big random delays to plusnet email but that was obviously solved).

[#14]

There is some chance that this specific issue is connected to forwarding.

A normal MTA to MTA relay will correctly handle deferral of acceptance - I'm busy, back off, please wait and try later - a forwarding service might throw-in the towel on the first - go wait - directive.

In general MTA to MTA really will keep trying for 5 days before giving up.

You might find merit in switching things around - make Zoho your primary email service and redirect your Plusnet emails to there.