VarExpandCrypt plugin usecase

[tai74 at vfemail.net]

Hai,
I found VarExpandCrypt plugin but not sure the usecase? Somewhere is  
more documentation for it?
https://wiki2.dovecot.org/Plugins/VarExpandCrypt


-------------------------------------------------

ONLY AT VFEmail! - Use our Metadata Mitigator to keep your email out of the NSA's hands!
$24.95 ONETIME Lifetime accounts with Privacy Features!  
15GB disk! No bandwidth quotas!
Commercial and Bulk Mail Options!