MAX is a feature that allows you to directly copy email attachments that meet certain customizable criteria to various online storage spaces such as Dropbox, Oodrive, Sharecan... as well as the Optimails Mobile Briefcase*.
A link is then inserted in the header of the e-mail which points directly to the file on the defined storage space, thus reducing the size of the e-mails received.
MAX is accessible in the Filtering menu:
Mobile Briefcase*: is only possible for domains hosted at Secuserve.