Thunderbird not connecting to mail server while nordvpn connected
I'm running Thunderbird 128.6.0esr (64bit) and nordvpn 7.32.3.0 with thunderbird being split tunneled. When I start thunderbird I get message that it can't connect to mail. If I turn off nordvpn it works fine. This started when I upgraded to 128.6.0esr. I would like to go back to the previous version of thunderbird. Where can I download previous versions of thunderbird?
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If Thunderbird stops working after having upgraded to a new version, always check this first to make sure you're using a profile with the right settings:
https://support.mozilla.org/kb/recover-user-data-missing-after-thunderbird-update
The problem is due to a VPN interfering with the authentication of mail accounts. Unless Nord provides an update that makes tunnelling work with TB 128, you have two options. Disable the VPN while using mail, or downgrade TB to a version that works with the current VPN. If you install an older version, the current profile will be incompatible, and will likely cause you some grief in re-establishing a working setup, unless you're familiar with profile management.