Disable (some) virus scans?

[Nerk Nerk]

We have a lot of false positives on the virusscanning. Loads of .docx files
get detected as virus.

Also files with 'double' extensions, such as "your invoice.docx.pdf" or
"yourwebsite.com.psd" get blocked.

I understand why that happens (first case: .docx are risky, second case:
looks like you are trying to hide the true extension) but still I would
like to accept those messages. Is it possible and easy to make that happen?

I think it is the virusscanning that Mailscanner does, not the
virusscanning done by Clamav that I also use.

Thanks in advance for any answers!
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