Disable ESET NOD32 v9 SSL email traffic certificate

I am using a self-generated certificate for my mail server to which I connect through SSL/TLS. Due to the self-generated certificate which I have not added to the Windows certificate store, Thunderbird asks me to add an exception for this certificate in order to use it. So far, things went fine for years.

Today, Thunderbird presented me a dialog to add an exception for my email certificate. Of course I was surprised and looked into the certificate details. It shows "ESET SSL Filter CA" in the chain, which is a clear indicator that this change is related to the upgrade of ESET NOD32 virus scanner to version 9 I performed yesterday.

A similar question for Avast suggests that

• this is not much of an issue, since the man in the middle here is an anti virus software that I trust.
• one could tu off that feature to get the old behavior back

So that's what I did: disable the email protocol check. Unfortunately this does not help, even after a reboot:

How do I get rid of ESETs certificate? (Uninstalling is not an option)

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