.CEF File Extension
File Type 1Class Action Gradebook Elementary File
What is a CEF file?
File created by the Elementary Edition of Class Action Gradebook, a program used by teachers for recording elementary school grades; saves the classroom roster and assignments as well as evaluated scores; can be used for generating report cards.
File Type 2CenturionMail Encrypted Package
.CEF File Association 2
Encrypted archive created by CenturionMail, a program used for encrypting emails and attachments; uses both compression and encryption as well as a password that is required to extract the archive.
CEF files are used for securely sending files over email. You need the CenturionMail software in order to open them.