[Dovecot] Order of istream and ostream chains

[Timo Sirainen]

On 12.2.2014, at 2.27, Philipp Brüll <philippbruell at gmail.com> wrote:

> I'm creating a scrambler plugin, that adds an istream and an ostream to the stream-chain for the mail input/output. It works well until the zlib plugin is added to the configuration. The scrambler should run before the zlib and encrypt the mail before it's compressed. Since, the plugin is named lib18_scrambler_... (and the other lib20_zlib....), that works well when a mail is received.
> 
> When a mail is read via IMAP, the plugins should handle the mail in the reverse order. So first, the zlib should decompress it and afterwards the scrambler should decrypt it.
> 
> But it seems, that they work the other way around. The scrambler istream gets compressed data as input. It's hooked in the chain of istream as the following...

In your previous mail you mentioned you're using v2.1.17. Have you tried with v2.2.10? I think this is already fixed (at least I've successfully used zlib + mail encryption plugin).