<p>Ok. First, there are good tools to remove duplicates, like mutt.</p>

<p>About the maxage removal with v6.5.7, does this help ? <a href="http://offlineimap.org/devel/2015/04/14/why-we-changed-maxage.html">http://offlineimap.org/devel/2015/04/14/why-we-changed-maxage.html</a></p>

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