Message is infected with Win.Exploit.CVE_2019_0903-6966169-0

[SH]

The issue is that ClamAV with latest daily signature files is marking false positively some pdf (or zip) attachments. Temporary solution is to add this signature to ignore list (https://www.clamav.net/documents/how-do-i-ignore-whitelist-a-clamav-signature)

echo "Win.Exploit.CVE_2019_0903-6966169-0" >> /<your-data-dir>/var/clamav/whitelist.ign2

And then restart container.