Can't forward email as attachment

[George]

Hello,I just install fresh Kolab 2 days ago on CentoOS 7 everything working fine except when I forward email as attachment to non local customers attachments are striped . So receiver receives .eml file but it's empty 0 bytes I did try to multiple different isp and all same results . Can it's be that Clamdav stripping it ? I did check mail.log don't see anything about the attachments there . 
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