please post a screen shot of the actual certificate.

See error message below

Thanks

sorry what I meant was the actual certificate details, like who issued it and the expiry date. it is under the view button.

The issue here is in determining if Yahoo have messed up and not updated a certificate, in which case creating an exception would be fine, or if a third party is trying to impersonate yahoo.

On balance most of these warning are fine and creating an exception is not a problem. But it can still an issue especially if the certificate says it is for hackersUnited for instance. Common sense applies with these more than anything else..

Here you go - a screen shot of details is below

It seems odd to me that they say it expired in Dec 2016 - but the issue just arose this morning - Feb 1 2017?

Let us know what you think

Thanks

I think yahoo have screwed up is what I think.

when we use a server name like mail.yahoo.com. That is not addressing a single server, it is addressing a cluster of serers. It might be two or it might be 10,000. The thing being that the router shares the workload over the cluster. In this scenario users never see a server down, or one that is rebuilt or replaced. BUT. If the technician that loads the server image messes up and uses an old image those unliky enough to have they requests routed to that particular server get weird messages like you have.

At least that is what I think is happening in this instance. So click to add an exception. I am pretty sure your still talking to yahoo and that is really the purpose of these error messages. To get a human to make a decision the machine really can not, "Does this look suspicious"

NOTE: Given the "in progress" migration of this forum, this response (and maybe your question), may disappear later.

This may also be part of Yahoo's drive to get people to stop using POP.

A lot of people have been having various problems with Yahoo's POP e-mail servers lately, like not accepting passwords, or requiring password changes (that they don't tell people about). All the while their IMAP e-mail servers work tickity-boo.

You could try setting up another "account" in Thunderbird for the same e-mail address, but using the IMAP server instead.

So after backing up my e-mail files (which are on my hard drive), I did as you suggested - accepted the exception. The first time or two it did not accept my password - but after shutting Thunderbird down twice - then it did accept my password and downloaded all the mails since yesterday, We will see what happens going forward

Thank you