Thunderbird not downloading email

Further to this, for others benefit if you get the same problem. Basically I went into advanced settings for web & email. Turned off ssl/tls filtering. Rebooted & turned it back on again. Restarted thunderbird & all was OK (this fixed outlook & opera too). I'm guessing some sort of certification corruption took place & this resolved it. I've reported the solution back to eset & asked them to add to their FAQ.

One odd thing though while I was testing them Outlook downloaded messages that later weren't visible in TB, or even in the web interface for icloud. How is that possible? Surely imap clients shouldn't delete from icloud server. There are no settings in outlook to leave messages on the server as that shouldn't happen, so I'm puzzled.

OK. So I've found the issue. For the benefit of anyone else who may get this problem. It was being caused by my virus scanner. When I turned off e mail scanning everything TB. Outlook/ Opera all began to work. eset nod32 have obviously made a recent change as I've had e mail scanning working on this software for years without an issue. I'll raise the issue with them. Thanks to those who replied. ATB

Hi thanks for taking the time to reply. I have an ipad which is working fine & I can access mail via the web interface. Also the android solution on my phone is working fine which would not be if I'd changed my apple id password (which I haven't). As I said above I even created a newly generated app specific password for the icloud/outlook solution which didn't work. I have since downloaded opera reader & created a new app specific password for that which also doesn't work. They all time out for some reason. I have asked the question on the thunderbird support group too, but as yet no answers, and as it seems to be affecting multiple non Apple e mail clients it seems more likely that the issue has been caused by some change at Apple's end within the last week or so.

Hi, thanks for the reply, but as I said in the question "I have an app specific password for this which has worked fine up until now, and am getting no error messages re passwords or anything." I have had this two-factor authentication set up for a while now.

I also set up outlook using icloud for PC with an app specific password I had just generated but that times out trying to connect to the icloud server too. Pretty sure the problem is not PC related I even temporarily disabled my windows firewall, but that didn't help either.