On Wed, Sep 11, 2013 at 3:36 AM, Maximilian Tyrtania
<lists(at)contactking(dot)de>wrote:
>
> JOIN emailsendings es ON et. ID = es.emailtemplate_id
>
ORDER BY
> es.sentonat desc
>
Perhaps on an index on (es.emailtemplate_id, es.sentonat desc) would help?