Problems With Microsoft Outlook Classic

[#1]

Hi @stuck Hi @Dinalt 

Looking deeper into the problem with Outlook/PN my daughter who is with PN had a problem with email through PN email is with others and Outlook would not connect. I went to see if I could rectify the problem, rebooted router etc all to no avail, when I tried to check my email on her wifi nothing. switched the Hub2 off. My emails through my sim worked fine, my daughters email through her sim now worked fine. Contacted PN and the response was IP address blocked by email provider (barracuda email protection), router was off for 15 mins so when switched back on was assigned a new IP and everything worked fine for both of us. Just another route for you to try.

[#2]

My Plusnet email account was working correctly in Outlook Classic, but now it isn't.

It worked until I looked in account settings to see what settings I had used when I set it up. They were exactly as described in this link:

https://www.plus.net/help/email-guides/how-to-set-up-plusnet-email/

I closed the account settings and now when I try to send an email I get this error message:

Your message did not reach some or all of the intended recipients.

Subject:     test

Sent:  26/11/2025 17:05

The following recipient(s) cannot be reached:

abc@xyz.co.uk on 26/11/2025 17:05

None of your email accounts could send to this recipient.

I looked in the account settings and they had changed. Both the incoming and outgoing Plusnet servers had been replaced by mail.enmail.co.

I changed them back to imap.plus.net and relay.plus.net but when I closed settings and tried to send an email I got the same error message. I looked in the account settings and the servers had reverted to mail.enmail.co.

I can receive emails, but I can't send them from my Plusnet account.

I'm stuck 😥.

[#3]

Was this an email a/c originally created using a wizard that tries to derive the email server names,
or was it created as a total manual entry where it is up to you to get it right ?


imap.plus.net & mail.enmail.co both resolve to IP 91.204.208.26 which is aka mail.plusnet.enmail.co

So that is why the in bound still works.


relay.plus.net resolves to 212.159.9.107 and 212.159.8.107

Hence the out bound fails.

[#4]

Thanks @PhilipHeyes. It was a manual entry.

The email has worked for months. I looked in settings with the intention of posting my settings that worked. When I closed the settings, outbound email didn't work. I looked again and both servers had changed to mail.enmail.co.

What do I need to change to get it working?

[#5]

---

@Jones wrote:

What do I need to change to get it working?

---

Try this:

1. Close Outlook
2. Open the Control Panel, yes the Control Panel, not Settings
3. Use the Mail applet to configure the server setting for Outlook
4. OK out ofeverything
5. Open Outlook

[#6]

@stuck Thank you.

I tried your suggestion. Partial success. I still can't send emails to the address that I tried previously, but others work OK.

Strange 🤔.

[#7]

Outlook and PN mail platforms are fully compatible.  There are no issues with the technologies.  Outlook might have timing failures dealing with large mail items.

Setting the server time out to 90 to 100 seconds can be helpful.  Unless the client is reporting a “password” error, there is nothing wrong with the server settings.  A black balled IP address will inhibit sending emails, but that will give rise to a “password” error.

The server connection diagnostic tool will help expose real issues masked as a “password” issue (if that’s what is being reported).

This stuff does not “just” not work, it does not work for a reason.  There are various scenarios where the Outlook profile becomes corrupt … especially with “new look” outlook.

On a recent mail migration job I ran, I found it impossible (or very difficult) to modify existing server settings.  You think you did it correctly, indeed you know you did it correctly … but on double checking, you find that the changes were ignored.

None of this has anything to do with Plusnet or the settings they publish, be they right or wrong.  The correct settings are well documented around here.  There has however been some recent complications with some migrated Force9 accounts … but no one here has mentioned email brands they are having problems with.

[#8]

Hi @Townman 

You say "A black balled IP address will inhibit sending emails, but that will give rise to a “password” error." this is not what I experienced my phone just would not connect to my email server it just kept trying and did not report "password error" 

Switched PN Hub 2 off so mobile connected via sim card and all emails came in.

Left the Hub off for 15 mins so when rebooted it aquired a new IP address then all worked fine

[#9]

Thought I'd have another look at this as we're going down the rabbit hole anyway :

Had another go using the mobile version of Outlook to add my own email address and after putting in the same information half a dozen times it finally worked (note not the mail box that is not working on the desktop).

Last night I readded the mailbox in question to my desktop and again it populates mail folders and can send mail but won't populate the inbox (some minor folders have some email and you can use another programme to move mail into a sub folder which will be reflected in the desktop mailbox). last night i was seeing the following error 800ccc0e-0-0-560 in inbox but this is no longer occurring (Inbox is still empty and I've checked that Inbox is root)

 

[#10]

@Dinalt 

Researching that error code (just use Google) quickly suggests a whole host of potential causes, some of which are within Outlook itself.  For example see Outlook Synchronization log error 800CCC0E-0-0-560? - Microsoft Q&A

[#11]

In response to

https://community.plus.net/t5/Email/Problems-With-Microsoft-Outlook-Classic/m-p/2030101#M55581

"just use Google" may suggest to some that you have a financial association with them. There are other search engines besides Google. Which are accesible on the web.

(P.S. Those gremlins just keep coming, don't they? I'm keeping my 'gremlins' local until I can squash them. If I can.)

[#12]

Another grumble distraction - Google is the search engine used by most and the act of searching for answers across the internet has the generic verb to Google, much the same as to Hover is to use a vacuum cleaner.

[#13]

Certainly some weird stuff happening with Force9 emails recently!!

Outlook on Android stopped receiving emails about 10 days ago. I haven't managed to get working again since (even though no settngs have changed, and I have checked everything several times against the recommended server settings). Tried the Reset, but that didn't help.

Roll on another week, and now Outlook Classic for Windows has stopped working sometime in the last 3.5 days. Been ill so had my laptop off, and it is now refusing to sync emails too, with the same error message others have have reported earlier in this thread: eg 0x800CCC0E. That was a new one on me, as I had a variety of issues like others in Sept with other error codes (eg 0x800CCC0F and another), which resolved themselves within 48hours back on the original settings just waiting for server issues to get resolved.

Since I couldn't get Outlook working today, I decided to check I hadn't been migrated to Greenby in the last 3 days, so I tried the Force9 Webmail which worked for me last week, and that was coming up with a "login failed" message. So I tried the Greenby Webmail just in case, and that was "account unknown"!  So I am assuming I haven't been migrated yet, but just facing similar issues to others here? Myabe?  I do have a fixed IP address, which is non-plusnet so I tried connecting to my work VPN to try connecting from a different IP address, and that didn't help.

I then wondered about checking my mailbox settings in Force9 Member Centre, bur couldn't find the email settings in there any longer (I was sure I saw them a few months ago!!). So is this an ongoing rolling outage from Forice9? Have I been migrated to Greenby and getting my login wrong for them? Have I just got issues with Outlook Classic having an outage? Or maybe a combination of several of these? How can I see the email mailbox settings in Member Centre to change the password on a particular mailbox? (Can someone post a link).

Is there a definitive way to know when I've been migrated to Greenby? (Other than by getting a welcome email, that I can't get if my email isn't working!!)

Thanks

[#14]

Spoke to my dad who has a mailbox on my account, and he is also not able to access email for the last 36 hours or so. He assumed it was a wider Plusnet email outage, but whilst the wider issues seem to have abated, but his email didn't come back either. He has also tried webmail, and that isn't working. Both of us have used webmail only a week ago successfully, so definitely something wrong. How do we establish if this is a temporary outage due to say our accounts being mid-migration (and maybe got in a batch that got stuck and just needs longer?)... versus being something that is more permanent issue specific to our account where we need someone to investigate our specific account?

In terms of migration emails about Greenby, I had a set in May, and another set in July (for my account and a few days apart for my sister's account). Nothing heard since for either.... until 2 weeks ago my sister & me got the Welcome to Greenby email for her account (no 60 day or 30 day email warning!!). However, only about her account... no email about Greenby since July on my account though, and certainly my Dad's mailbox on my account also hadn't had a Welcome to Greenby when he last got email 36 hours ago. Is there a definitive way to know when you've been migrated yet or not? 

[#15]

You may use Google for your googling, but Google isn't a verb. It'd be a proper noun.