[Dovecot] compressed IMAP traffic

Patrick Domack patrickdk at patrickdk.com
Mon Sep 28 19:55:06 EEST 2009


Hmm, strange results.

My dovecot compiled on freebsd using openssl doesn't do compression.
But my dovecot compiled on redhat using openssl does do it.

redhat openssl 0.9.8b
freebsd openssl 0.9.7e (really old)


Quoting Ed W <lists at wildgooses.com>:

> Timo Sirainen wrote:
>> On Sep 22, 2009, at 9:08 PM, Leonardo Rodrigues wrote:
>>
>>>  is there anything that can be easily used to automatically   
>>> compress IMAP traffic between client and server ? I was thinking   
>>> if the SSL/TLS code enables some kind of compression as well.
>>
>> If your OpenSSL supports it, Dovecot supports it. I recently tested  
>>  this with gnutls-cli program, openssl s_client for some reason   
>> didn't support it. I've no idea if any actual IMAP clients support   
>> it.
>>
>
> I notice that the openssl docs require compression to be specifically
> enabled and are somewhat scathing about support...
>
> http://www.openssl.org/docs/ssl/SSL_COMP_add_compression_method.html
>
> Anyone care to comment further?
>
> Ed





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