All Virtuemart Order e-mails are marked with Question Marks from google

[kaiserdom]

Hello

I' ve set up SPF and DKIM records in my server's DNS Settings. All the mails that my Joomla site sends, either by itself or through Acymailing, are marked by gmail properly. The only emails marked with a question mark are the virtuemart ones. What am I missing here? Need help.

Best regards
Kyriakos

Joomla 3.7.4
Virtuemart 3.2.2
PHP 7.0.22