trix.hosting
Verified User
mail_compress=yes should be safe to use, it just gzips new emails received, old emails are left untouched. To gzip old emails, dovecot_compress.sh should be used. It worked fine in testing environment to compress old emails, however, it hasn't been extensively tested (no feedback from production boxes yet), so there might be minor issues with it
Works Well, it's do what it's have to do.