[Dovecot] zlib config questions

Terry Barnum terry at dop.com
Fri Dec 6 21:01:51 EET 2013

On Dec 6, 2013, at 8:23 AM, Robert Schetterer <rs at sys4.de> wrote:

> Am 06.12.2013 17:01, schrieb Charles Marcus:
>> On 2013-12-06 10:55 AM, Richard Platel <rplatel at tucows.com> wrote:
>>> One gotcha if you're using maildir is, if you're planning to compress
>>> old mail, make sure that the S= and W= sizes in the filenames are
>>> correct,
>> And how do you make sure of this? Is there a script? Or do you just pray?
> this is only if you manual convert the whole store i.e with dsync to get
> more free space , if you simple enable the plugin you have not be afraid
> cause only new mail will may get compressed
> but however zlib and maildir had bugs in some dove releases or version
> updates, see list archive how people fixed it

Thank you Richard, Charles and Robert for your insight and suggestions.

I'm curious how many people here use the zlib plugin. Is it common or is drive space cheap enough that it's not worth it to run the risk of potential problems?

I am using Maildir and did read the threads from last year of problems with the manually compressed mail S and W values being incorrect as well as other filename problems. Have these been fixed in dovecot >= v2.2.5?

Once you enable zlib, does this mean you must use it from that point on? Once email is compressed, if you disable the plugin does dovecot lose the ability to access those compressed emails?


Terry Barnum
digital OutPost

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