VM customer service has not been that responsive - even before C19!! After reporting this problem to VM through twitter, someone from VM (called himself 'middleman' between me and the technical department) called me several days ago, asked basic information and said he will pass on the information to the technical department who would contact me - have not heard since!!
I have a very similar problem, which started last week. I am using Outlook Express (no longer supported) on Windows XP (no longer supported) and when trying to download emails on ntlworld.com and virginmedia.com, I get this warning:
I can download emails using Thunderbird. The Root Certificate is current and the same on all 3 PCs / Laptops
I've tried turning off the fire wall. I've re- synced the clock. I've tried with SSL on & off. It still does not download emails
I've tried using a new email user, it still does not work.
Clicking 'Yes' to 'Do you want to continue using this server?', results in 'Failed'
Using Outlook Express on a PC, in a different location, running Windows Vista works just fine
Using Widows Mail on Win 10 (on laptop in another location) works fine
Using email Hub on Blackberry Keyone works fine.
It did on one occasion start to download 30 emails, it did 2 and then stopped on the third. I've not been able to get it to do that again
All in all, I'm a bit puzzled. Any help would be appreciated.
It's not just about the certificate being in date. A certificate can be in date but can be revoked by the issuer so that it s no longer valid. However looking at the information you provided, that Root certificate doesn't belong in the certificate chain. The certificate I'm seeing on my machine is issued by Globalsign and the Root certificate I'm seeing is a Globalsign root certificate
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