Re: [imapsync] sync everytime

[Michele Marcionelli <michele dot marcionelli at math dot ethz dot ch>]

Salut Gilles

Thank you for you quick answer... too bad that I didn't check by myself into the FAQ ;-)

Ok... Now I compared the "source" header and the "destination" header I I noticed following:

src:
Return-path: <imapsync-owner at listes dot linux-france dot org>

dst:
Return-Path: <imapsync-owner at listes dot linux-france dot org>

See the capital "p" of "Path". Who did change this? Server2? Imapsync?

Moreover...

src:
Message-id:
 <fc dot 006640d82175b360006640d82175b360 dot 2175c6b8 at firstclass dot wellesley dot edu>
MIME-version: 1.0

dst:
Message-ID: <fc dot 006640d82175b360006640d82175b360 dot 2175c6b8 at firstclass dot wellesley dot edu>

(note: here the header MIME-version is placed somewhere else).

Is it possible to:
1) do a case insensitive check of the header?
2) ignore new newlines and spaces?
3) ignore ordering of the header information?

Thanks,
Michele



On Oct 25, 2010, at 16:58 , Gilles LAMIRAL wrote:

> Hello,
> 
> From the FAQ:
> 
> =======================================================================
> Q: Multiple copies when I run imapsync twice ore more.
> 
> R. Multiple copies of the emails on the destination server. Some IMAP
> servers (Domino for example) add some headers for each message
> transfered. The message is transfered again and again each time you
> run imapsync. This is bad of course. The explanation is that imapsync
> considers the message is not the same since headers have changed (one
> line added) and size too (the header part).
> 
> You can look at the headers found by imapsync by using the --debug
> option (and search for the message on both part), Header lines from
> the source server begin with a "FH:" prefix, Header lines from the
> destination server begin with a "TH:" prefix. Since --debug is very
> verbose I suggest to isolate a email in a specific folder in case you
> want to forward me the output.
> 
> The way to avoid this problem is by using options --skipheader and
> --skipsize, like this (avoid headers beginning whith the string "X-"):
> 
> imapsync ... --skipheader '^X-' --skipsize
> 
> To skip several headers you can use --skipheader one time
> 
> imapsync ... --skipheader '^X-|^Status|^Bcc'
> 
> If you think you have too many header to avoid just use
> 
> imapsync ... --useheader 'Message-ID' --skipsize
> 
> Remark. (Trick found by Tomasz Kaczmarski)
> 
> Option --useheader 'Message-ID' asks the server to send only header
> lines begining with 'Message-ID'.  Some (buggy) servers send the whole
> header (all lines) instead of the 'Message-ID' line. In that case, a
> trick to keep the --useheader filtering behavior is to use
> --skipheader with a negative lookahead pattern :
> 
> imapsync ... --skipheader '^(?!Message-ID)' --skipsize
> 
> Read it as "skip every header except Message-ID".
> 
> ======================================================================
> 
> -- 
> Au revoir,                             09 51 84 42 42
> Gilles Lamiral. France, Baulon (35580) 06 20 79 76 06
> 
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> imapsync,    http://linux-france.org/prj/imapsync/
> 

-- 
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Michele Marcionelli
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