XGS Email SMTP File protection problems with S/MIME Mails

Question

Hi guys, 
 we have problems with SMTP File protection and S/MIME mails. 
 File protection is active and configured with Block file types "ALL". MIME white list is configured. 
 Now, external S/MIME encrypted Mails are getting filterd: 
 ontent-Type: text/plain;charset=UTF-8 Content-Disposition: attachment; filename= "filtered_smime.p7m.txt" Content-Transfer-Encoding: base64 
 I cant find mime types for whitelist, all manual added mime types are not working... File types - Sophos Firewall 
 Manual mime types for whitelist:

Sophos XGS3300, SFOS 19.5.1 MR-1-Build278

Vivek Jagad · Answer

Hello Michael Schmidt8 ,

Thank you for reaching out to the community, According to my understanding, if an MIME's main parent container is blocked, it cannot allow MIME separately. However we can double check this with the logs based on whether the email protection is deployed through MTA or legacy, so that I would request you log a service request and revert us the service request number here.

XGS Email SMTP File protection problems with S/MIME Mails

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