[Dovecot] Some Information about compression rates to expect using zlib/xz compression

compression : xz, Level 6

here some compression rates I experienced :

Diskspace usage : user1: uncompressed : 2.3GB --> compressed 1 GB user2: uncompressed : 6.2GB --> compressed 3.9 GB

just for your reference

Ing. Robert Nowotny Rotek GmbH Vienna/Austria