efa-project.org

Virus (YARA.invalid_trailer_structure.UNOFFICIAL)

and Virus (YARA.possible_includes_base64_packed_functions.UNOFFICIAL)

Is there an workaround or update yet?

Fixed, I have disabled YARA rules in master.conf.

Encountered the exact same issue today.

Instead of disabling Yara rules altogether (I use them),

in /etc/clamav-unofficial-sigs/user.conf commented out the line
and restarted clamscan

I have the same issue and commented out the line that kicou said.

Now I have a bunch of emails that are marked as virus, but I have no option to release those emails. Some are important.
Is there a way to release them?

I searched in /var/spool/Mailscanner/quarantine/<date>/message, but I can't find them there.

I think I mentioned this in another thread but unless you are quarantining silent viruses in Mailscanner.conf, you cannot release them. I recommend that you turn that option on if you want to have the ability to do this.

Ok Thank you.
Just enabled that option.