It's ok to cover email address but it does not help if you cover the server details.

What server are you using ?

re : TB on the Win10 laptop is configured POP3

You mention the laptop is the one with an issue. You say you uninstalled everything (I uninstalled TB using RevoUninstaller to completely wipe TB from the computer, including any registry entries.) - can I presume you did not remove anything to do with profiles?

Please note - reinstallation rarely resolves anything. Q: Where did you get the download - was it from the official website as shown below or elsewhere ?

• https://www.thunderbird.net/en-US/thunderbird/all/

On Windows 10 laptop: Check Firewall Exit Thunderbird. Access the Firewall. This might be controlled by Windows default or by an Anti-Virus product you installed. Thunderbird (thunderbird.exe) must be set up an allowed program. But where Thunderbird program has installed depends upon whether you got it from official website or from Windows App Store and also whether you download/installed a 32bit or 64bit

VPN Please check to see if a VPN has been enabled - servers do not like VPN because it ides your IP address and server thinks you might be a hacker so it blocks access. I have seen some Anti-Virus products auto enabling VPN. So, if you find one enabled then Switch off VPN.

Please post the following info so we can you are using correct server details:

• In Thunderbird (Windows 10 laptop)
• Help > Troubleshooting Information
• Scroll down to 'Mail and News Accounts' section
• Post an image that shows all the data in that section.

Tell us where you got the Thunderbird installation. Tell us if you installed 32 bit or 64 bit. Tell us what Anti-Virus you are using. Confirm the Firewall has Thunderbird as an allowed program. Confirm there's no VPN operating.

Please note - this is just a heads up. POP only downloads from server Inbox. So if you have used desktop Imap account and moved anything out the Inbox then the Pop account will not be able to download it. So, basically, to keep pop up to date, you do need to start the pop account to get download before you start up the Windows 11 desktop which uses imap.

Hello Toad-Hall

Thank you VERY much for your assistance, your time and expertise is greatly appreciated.

Sorry for hiding the server info. The server is; mail.free-online.net

Yes, you're correct to presume that I did not remove anything to do with profiles. OK, noted about re-installation rarely resolving issues.

A: Yes, the download of Thunderbird was from the official site that you've linked to.

Firewall: Thank you for the instructions on adding TB to the allowed apps. I have done this. The thunderbird.exe was located C:\Program Files\Mozilla Thunderbird > thunderbird.exe which I think means this is the 64bit version?

VPN: There is no VPN installed. In fact there are no third party security apps installed at all. I just use the default Windows defender.

Mail and News Accounts: Image attached.

Summary: Thunderbird was downloaded from the official 'site. 64bit version. No anti-virus installed other than Windows default. The firewall now has Thunderbird as an allowed program. There is no VPN installed.

Regarding your final note. To be more accurate; the Win11 desktop and Win10 laptop use the same server but different mailboxes with their own passwords of course, so are completely separate and should have no affect on each other and have worked fine for about 3 years.

Kind regards lee124

I'm wondering if the info at these links is going to effect you. Plus net https://www.plus.net/help/email-guides/ https://www.plus.net/help/email-account-changes/

Greenby FAQ's says email settings will not change, but it does mention a temporary issue when they are moving the account which may effect you. However, I do not know if you have opted to move or not. But if all the issue on receiving etc has ocurred recently due to this moving etc then maybe this is important - Greenby says - You only need to log in after migration to continue using your email. https://greenby.com/faq

Hello Toad-Hall

Well I'll be ...... Thank you for finding this info. I had no knowledge of this. No communications from Plusnet at all. But it would seem that this is the very likely cause of the problems.

I will look into this and let you know the outcome.

Thank you very much.

Kind regards lee124

Hello Toad-Hall

I telephoned Plusnet and spoke with Eesha Telawane. I mean she was as helpful as she could be but we couldn't get to the cause of this email issue. Except that we were able to eliminate the transfer of the email service from Plusnet to Greenby, as this has not taken place yet, well not for me at least, and that I would receive an email when it does occur. The call was ended by her sending me an email with various settings etc to try. The email follows below the line:

____________________ Below are the server details you will need to setup your Mail client

When you first set up your email application for using your Freeonline email account, it'll ask you for your email username and password. They're usually your: Account Username Account password

If you are trying to add one of your additonal mailboxes you'll need to use:

your mailbox username, typed as username+mailboxname e.g. smith+andrew your mailbox password

IMAP

Incoming server - imap.free-online.net

Incoming port - 143

Outgoing server - relay.free-online.net

Outgoing Port - 25 or 587

SSL - No

SMTP Auth - Yes

POP

Incoming server - mail.free-online.net

Incoming port - 110

Outgoing server - relay.free-online.net

Outgoing Port - 143

SSL - No

SMTP Auth - Yes

Here are some guides for the more popular applications out there.

Windows Mail Outlook Mac Mail Thunderbird Iphone and Ipad Android

More help can be found on our website here

Kind regards,

Eesha Telawane

____________________

I tried all the port numbers etc and nothing worked. Until something dawned on me when I read the line "your mailbox username, typed as username+mailboxname e.g. smith+andrew" The email address that could not receive email in Thunderbird (the Win10 laptop), was a mailbox I'd setup some 3 years ago. I'd been using the mailbox username without the "username+" part. Once this was added, the email was then received fine.

So there you go, the simplest of oversights on my part, for all my certainty that the settings were correct - they were not! Though, as it had functioned perfectly for 3 years when the mailbox username was not set correctly, perhaps I have a little bit of an excuse ;-)

Thank you once again for your help.

Kind regards Lee.