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Yesterday I update Thunderbird to version 78.4.3 and today I update My ESET Internet Security to version

The issue is I cannot fetch any emails from my own servers (STARTTLS)

I followed the procedure in this topic:

and here is the zip file from log collector

Only when I disable the Email client protection I am able to fetch my emails.

Any advise is appreciated,


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Hello @notuo,

I would start with:

  • Disable the SSL/TLS filtering in the ESET GUI
  • Reboot the system
  • Change update type to pre-release
  • Wait until the update finishes and make sure you have Internet protection module 1414
  • Enable the SSL/TLS filtering in the ESET GUI
  • Check if you are able to fetch the e-mails in Thunderbird.


If not 1. is the certificate used to secure the connectivity to the e-mail server trusted by the system on which you run the Thunderbird? 

If not import it to be trusted and try to fetch the e-mail again.


If even that won't help provide us with a fresh set of logs recorded with the Internet protection module 1414



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On 11/19/2020 at 8:08 PM, Rod-N said:

do I change the update back after from pre-release or leave it there?

If you are not running any mission critical applications on the machine, I'd recommend keeping pre-release updates enabled. However, if you don't want to receive program and module updates among first, switch to regular updates after 1-2 weeks.

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