Norton 360 cripples Thunderbird e-mail Gmail send

Norton 360 for Windows
1

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Issue abstract:Norton 360 cripples Thunderbird e-mail Gmail send

Detailed description: Thunderbird e-mail application suddenly useless a few days ago. Using Thunderbird, I could not send or receive e-mails. Substantially the same issue exists on both of my Win7 machines, and on one of my two Win10 machines. All have Norton subscriptions.

After many frustrating house, I found that Norton now includes an e-mail inspection routine. When I disabled e-Mail inspection feature on my Win7 desk top machine and restarted machine, Thunderbird resumed working.

Is the the Norton email inspection tool compatible with Mozilla Thunderbird? If so, how do I get the two to work together?

Product & version number: Thunderbird 115.18.0 (32-bit), Norton 360 latest version as of 12/30/'24.

OS details: Win7 Professional, Version 6.1.7601 Svc Pk 1 Build 7601

What is the error message you are seeing? " the site attempts to identify itself with invalid information. The certificate is not trusted because it hasn’t been verified "

If you have any supporting screenshots, please add them:

2

have you tried this setting?

Is there a reason, you use Thunderbird 115.xxx ??
For myself, I am on 128.xxx - this works fine with the new norton.