Posteo.de offers filters which can be configured through the web UI. This function is however lacking function of the full set of sieve features which I'd get from filters defined through a Sievemanager, like the Sieve Thunderbird add-on.

Their FAQ doesn't mention it, I'm however almost certain that I already used it in the past. Maybe it was removed or hidden.

1 Answer 1


Most likely you are looking for this plugin which adds the ability for users to manage their sieve mail filter rules: SieveRules-Managesieve

If so, then answer you your question is yes, it does.

  • Thanks for your input. So, I can only configure the sieve filters through a roundcube instance which I have to set up and in which I'm installing the reference plugin? If sieve is supported by the server shouldn't I be able to connect with any managesieve client? Commented Jul 6, 2019 at 10:14
  • as far as I know, it's supported only indirectly via plugin+roundcube
    – user0
    Commented Jul 6, 2019 at 10:33
  • 1
    I got a reply from posteo.de support stateing that they don't support external interfaces and that configuration ought to be done through filters in the Web UI. Commented Jul 9, 2019 at 16:23

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