[Dovecot] Converting old emails to compressed format

[Christian Rohmann]

Hello Wolfgang,

On 29.07.2014 16:58, Wolfgang Rosenauer wrote:
> I'm now facing the same issue with 2.2.13.
> zlib is working for new mails but as opposed to some information I
> found dsync (backup) does not convert old mails to compressed.
> For example this post suggests that it should happen:
> http://thr3ads.net/dovecot/2013/07/2663810-dsync-backup-mails-compressed
> and also some Dovecot book also states to convert the mailbox just use
> dsync backup after zlib is enabled.
> Still I'm not able to make it work.


You have to set the compression type with the zlib_save option.

i.e.:  "-o plugin/zlib_save=gz"



Regards

Christian