avast one & Thunderbird - certificate issue

[Eric169]

Hi
I changed to avast one recently.
Thunderbird does not load new emails. When sending an email, I see an security exception rule error.

I think I have to export the avast certificate. How do I do that?

Regards, Eric

[Dietmar28]

Same issue here...
Thunderbird and Avast One.
I can only recieve mails if i close Avast for 5min.

[DavidR]

Are you getting an Avast or other Warning, if so what is it  ?

Now I don't use Avast One so I'm not familiar with its settings.

I found this old topic from April 2022 and I don't know if this is still the case.  Hopefully this will allow sending of emails.

Hi,
The option to export a certificate is not available in Avast One.
The current option is to turn off "scan outbound emails SMTP" and "scan attachments when attaching (Outlook only)" - under Email Guardian.
Our developers are looking into this.

I can't see anything to confirm if this has changed.  Also if you do as suggested above if you will be able to download emails from the supported email clients.
Check out this FAQ article https://support.avast.com/en-gb/article/email-guardian-faq/#pc - Select Avast One