Re: perdition and IMAP COMPRESS (RfC 4978)

On Tue, Mar 01, 2011 at 09:21:06PM +0100, Sven Hartge wrote:
> Hi!
> 
> I am in the planning stage for an upgrade of my employers mail system.
> 
> In the backend I will be using dovecot which supports IMAP COMPRESS
> <http://www.ietf.org/rfc/rfc4978.txt>,
> <http://wiki2.dovecot.org/Plugins/Compress>.
> 
> In the frontend I would like to continue using perdition.
> 
> >From the RfC I assume, perdition should cope with IMAP COMPRESS, since
> everything after a successful authentication is just passed through.
> 
> >From the RfC:
> 
> ,----
> |    The following example illustrates how commands and responses are
> |    compressed during a simple login sequence:
> |
> |         S: * OK [CAPABILITY IMAP4REV1 STARTTLS COMPRESS=DEFLATE]
> |         C: a starttls
> |         S: a OK TLS active
> |
> |             From this point on, everything is encrypted.
> |
> |         C: b login arnt tnra
> |         S: b OK Logged in as arnt
> |         C: c compress deflate
> |         S: d OK DEFLATE active
> |
> |             From this point on, everything is compressed before being
> |             encrypted.
> `----
> 
> Is my assumption correct that it is safe to use perdition in such a
> setup? Or am I threading on thin ice here, bound for disaster?

Hi Sven,

I think that you are correct and the only thing that you will need to teach
perdition is the correct capabilities to advertise.  That can be done
through the configuration file.

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