topic Re: mail.plus.net certificate not trusted in Email

mail.plus.net certificate not trusted

paul1974 — Thu, 09 Sep 2021 16:52:49 GMT

Hi,

This afternoon Apple Mail started saying that the Plusnet certificate was bad. Looks like it may have been renewed today.

There hasn't been any updates to my MacBook this afternoon.

Is anyone else having this problem?

Thanks.

Re: mail.plus.net certificate not trusted

mavison — Thu, 09 Sep 2021 17:05:30 GMT

Yes! See my post a few seconds after yours, in the thread 'tls certificate error'

Re: mail.plus.net certificate not trusted

mhi1 — Thu, 09 Sep 2021 17:13:44 GMT

I'm getting something very similar. Copying the text from my desktop email client's error dialog:

The SSL certificate of imap.plus.net cannot be verified by the following reason:
  unable to get local issuer certificate

Subject: /businessCategory=Private Organization/jurisdictionC=GB/serialNumber=03279013/C=GB/L=Sheffield/O=Plusnet plc/CN=mail.plus.net
Issuer: /C=US/O=DigiCert Inc/OU=www.digicert.com/CN=GeoTrust EV RSA CA 2018
Issued date: Sep  6 00:00:00 2021 GMT
Expire date: Sep  7 23:59:59 2022 GMT

SHA1 fingerprint: 53:08:98:9C:B3:BB:A7:B2:BD:A5:9B:B9:EE:0A:34:CC:C6:C3:C8:80
MD5 fingerprint: 4B:7D:6B:FA:82:BF:27:9A:05:28:09:C1:F8:0E:B2:C8

The equivalent message on my Android email client says, "Trust anchor for certification path not found."

PlusNet, please tweak your certificate.

Re: mail.plus.net certificate not trusted

mhi1 — Fri, 10 Sep 2021 14:02:28 GMT

C'mon, PlusNet! This fault has gone away, but it would be helpful to have a brief message to tell us either

PlusNet technical staff didn't do anything, it just fixed itself, or
PlusNet have taken action, understand what went wrong, and have corrected the cause so that it shouldn't happen again.

Any one of the four topics describing IMAP and POP problems yesterday and this morning would do. No need to reply more than the once.

Re: mail.plus.net certificate not trusted

Gandalf — Sun, 12 Sep 2021 15:27:50 GMT

Hello, I'm really sorry for the issues you've had with your emails on Thursday and Friday.

I can confirm that we had taken steps to fix it and we do understand what went wrong, so it shouldn't happen again.

Let us know as always if you have further issues or there's anything else you'd need help with.

Re: mail.plus.net certificate not trusted

r4k9g — Sun, 12 Sep 2021 17:36:00 GMT

Hello, you say there have been steps taken to fix this issue, but I have not been able to get emails on my Plusnet account since last Thursday, and I'm still getting mail delivery failures when I've tried sending test emails from another account to my Plusnet email address. I use Thunderbird and on Thursday and Friday when I switched the computer on and loaded Thunderbird it reported 'mail.plus.net:995' certificate is not trusted... When I clicked on 'Get Certificate' it reported 'This site attempts to identify itself with invalid information', 'No Information Available' and 'Unable to obtain identification status for this site'. I have not changed any of my setup for months or even years so there has been no change here. Everything was fine up until Thursday. Any ideas what has happened? Thanks.

Re: mail.plus.net certificate not trusted

jab1 — Sun, 12 Sep 2021 17:43:12 GMT

@r4k9g Welcome to the forums. When did you last try to send or receive an email? It appears the others who reported this error are now able to work normally.

Re: mail.plus.net certificate not trusted

r4k9g — Sun, 12 Sep 2021 18:07:35 GMT

Thanks for your reply John. I sent a test email at 09:45 this morning and again at 18:39 just before my posting here on the forum, and both were returned almost immediately. So I'm not able to get an email from my gmail account (using gmail smptp) to my Plusnet email inbox, yet here is the odd thing, the Plusnet Community Mailer email arrived in my Plusnet inbox fine at 18:43! So now I'm somewhat puzzled by what is happening. I'm about to try sending from another different account to see what happens with that one. Roy

Re: mail.plus.net certificate not trusted

jab1 — Sun, 12 Sep 2021 18:11:11 GMT

What was in the failure notice, as in what reason did give for non-delivery?

Re: mail.plus.net certificate not trusted

r4k9g — Sun, 12 Sep 2021 18:30:16 GMT

OK problem solved John - it was an auto-fill of the email address error in the 'To' line today. Instead of using the correct address in my email address book, it was picking up an incorrect email spelling from the 'collected addresses' section and I've no idea where that came from. It wasn't there before I'm sure. Anyway I've now deleted it. Thanks for the help. Roy

Re: mail.plus.net certificate not trusted

jab1 — Sun, 12 Sep 2021 18:32:49 GMT

Glad it's sorted Roy - these things happen, and they are sometimes a pig to spot.

Re: mail.plus.net certificate not trusted

DaveCW — Sun, 12 Sep 2021 18:44:51 GMT

When is the certificate error issue going to be sorted. Still getting it.

if I select to use the certificate the error comes back shortly after. If I install the certificate it's the same story.

Re: mail.plus.net certificate not trusted

jab1 — Sun, 12 Sep 2021 18:48:44 GMT

@DaveCW Wierd - everyone else is reporting the issue fixed, and the cert is still valid.

Re: mail.plus.net certificate not trusted

jncunliffe — Sun, 10 Oct 2021 15:29:01 GMT

I'm sorry to say but I think this certificate error has reappeared. Adding my PlusNet account to a new, empty, profile in Outlook 365, I enter my email address followed on the next screen by password (all that is required according to the PlusNet help page for Outlook 365). I'm presented with:

The issued to surprised me as I would have thought it would have referred to imap.plus.net and not the POP server.

If elect to continue I get another error this time for the outbound server.

Clicking on Yes again Outlook tell me...

But of course it hasn't been.

Is this a PlusNet issue or am I doing something fundamentally wrong here?

Cheers,

JonC

Re: mail.plus.net certificate not trusted

TheMightyAJ — Sun, 10 Oct 2021 18:38:56 GMT

Hi @jncunliffe,

I'm sorry to hear that you're experiencing this issue. Had you been affected by this issue previously, or is this the first time you've noticed this? You'd mentioned that this is occurring when you tried setting up the account in a new blank profile - have you got your email account set up on another profile/mail client/device without issues, or is this the first time you've attempted to set the account up this way?

Re: mail.plus.net certificate not trusted

jncunliffe — Sun, 10 Oct 2021 19:05:05 GMT

Hi Alex,

It's the first time I've encountered this problem. I have been having problems with my email in that the Inbox (root) keeps disappearing (emptying). The folders within my Inbox remain as does their content. This was through Outlook (365). On iOS I see similar issues where the who account empties and then re-syncs periodically.

In an effort to fix this problem in Outlook I deleted my entire profile. It's when I've tried to add my account back into the new profile I've created that I'm getting this problem. I have however, not a long term solution, been able to set the account up in Thunderbrid with success.

Happy to support in anyway I can to get this resolved.

Cheers,

JonC

Re: mail.plus.net certificate not trusted

DaveCW — Sun, 10 Oct 2021 22:28:11 GMT

Ok after a bit of digging I have sorted this out! Re check the incoming and outgoing server settings. My issue only became apparent when I migrated from Thunderbird to Outlook 365. The issue appears to be caused by old server settings!

Server settings

Incoming

mail.plus.net

Port 995

Tick this server requires an encrypted connection (SSL/TLS)

Outgoing

relay.plus.net

Port 587 -

Encryption method STARTTLS

Tick My Outgoing (SMTP) server requires authentication and check he radio button for use same settings as my incoming mail server.

I got this from the Plusnet help pages How to set up Plusnet email | Help | Plusnet under What other settings do I need. I had been using old settings in Thunderbird which are now defunct. You need to do the same for each mail account if you have multiple email addresses with Plusnet.

There are settings for POP & IMAP. If you want the server to retain your emails use IMAP. I use POP as i use a .pst file locally and don't want my emails retained by the server. You have to take the tick out of leave a copy of messages on server on pop account settings.

Re: mail.plus.net certificate not trusted

jncunliffe — Mon, 11 Oct 2021 07:38:35 GMT

Thanks for your post DaveCW. One step forward. If when creating my account in Outlook I accept the certificates and then go into the settings and configure as below, except I'm using IMAP, I can now see the folder structure within the Inbox. That's where the progress halts. When I click on any of the folders, or the Inbox itself, they appear empty and I get the following sync error.

😞

Re: mail.plus.net certificate not trusted

TheMightyAJ — Mon, 11 Oct 2021 11:41:42 GMT

Hi @jncunliffe,

Thanks for getting back to us. If Thunderbird seems to be working fine, it suggests this is most likely an issue with Outlook. It may be worth trying to setup the account using POP3 settings, though this would download the emails directly to that profile/device.

Re: mail.plus.net certificate not trusted

jncunliffe — Mon, 11 Oct 2021 14:53:02 GMT

Hi Alex, I know where you're coming from but I'm reluctant to use POP as I used my email across multiple devices. After some further experimentation, I do believe there is an issue with my one specific email account. I have set up another one of my PlusNet accounts in Outlook and whilst I still got the certificate warnings and had to hand craft the config after Outlook had 'successfully(!)' added my account. It's is now working perfectly, unlike my other, primary, account.

If you can contact me via a PM I can share the details.

Cheers,

JonC