I'm not familiar with DATAZ at all -- is that part of DJB's "QMTP" 
protocol?  If it involves sending binary data in the SMTP stream, 
spamdyke will certainly become confused and corrupt the data.  spamdyke 
expects all SMTP data to be sent in RFC 822-style plain text (encoded if 
necessary).

The binary is probably linked against zlib if your spamdyke includes TLS 
support.  Although spamdyke doesn't use zlib directly, I'm pretty sure 
the OpenSSL library uses it.

-- Sam Clippinger

Ben Klang wrote:
> Hello List,
>
> I am seeing some strange behavior from Spamdyke.  When enabling  
> Spamdyke inline my delivery between two Qmail-LDAP instances begins to  
> fail due to some errors in the compressed DATAZ stream.  Removing  
> Spamdyke from the equation makes the mail begin to work again.  The  
> exact error message varies a bit but I have seen the following:
>
> 451 Receiving compressed data failed: invalid literal/lengths set  
> #(4.3.0)
> 451 Receiving compressed data failed: invalid distance too far back  
> #(4.3.0)
> 421 Timeout. Talk faster next time.
> 451 See http://pobox.com/~djb/docs/smtplf.html.
>
> I found a mailing list post [1] that described disabling the CRLF  
> feature.  I tried recompiling with that change because I suspected  
> that Spamdyke may be corrupting the zlib-compressed data thinking that  
> the data was missing the extra carriage returns.  I tried the  
> suggested patch but it did not solve my problem.
>
> I found another mailing list post [2] that mentions that Spamdyke does  
> not use zlib at all.  Has something changed since then?  I noticed  
> that my Spamdyke binary is linked against zlib.  On my system I am not  
> using ClamAV or anything else in the delivery path other than Spamdyke  
> and Qmail-LDAP.
>
> I have enabled the Spamdyke log-dir option and can share those if  
> requested.  Have I missed anything?  Any ideas why my mail reception  
> is failing?
>
> For reference, my platform is Ubuntu Hardy on amd64.  Spamdyke version  
> is 4.0.10.
>
> Thanks,
> /BAK/
>
> [1]: http://www.mail-archive.com/[email protected]/msg01989.html
> [2]: http://www.mail-archive.com/[email protected]/msg01582.html
>
>   
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