While there is not a de facto attachment size limit in PreVeil Mail, we recommend limiting the size of attachments to no larger than 75-100 MB in size for best performance in sending and receiving the message.
Note: The above limit is for the fully installed version of PreVeil. For PreVeil Express users, the attachments should be no larger than 5-10MB.
We would suggest using PreVeil Drive for file sharing instead as it is better able to handle sharing larger files and there is a built-in ability to set sharing permissions in Drive in a way that isn’t possible with email attachments.
Please see: https://preveil.atlassian.net/servicedesk/customer/portal/2/article/318865532?src=-1719636891 for information on using PreVeil Drive.