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I'm looking for a way to retrieve my mail (with a desktop application or a web frontend or another way I can't think of) with support of arbitrary filters. This shall include all of the following criteria:

  • full set of logical conjunction, disjunction and negation of (atomic) filter expressions and logical conjunction, disjunction and negation of already existing filters (i.e. reusability of easy filters in more complex filters)
  • support to query all mail headers
  • the whole set of IMAP operations as actions to be executed when the filter matches

In other words, I'm looking for an application implementing sieve (http://de.wikipedia.org/wiki/Sieve ) or something very similar.

In order to be maintainable the filter specifications have to be usable by all the applications mentioned above. This means that the criteria has to be fulfulled by one server side solution (my own server or a possibly cost free service) or has be a solution consisting of clients all able to handle a portable filter specification. Creating a separate mail address with an individual domain on the server is not a problem!

I tried:

  • aol.de: far away from arbitrary combinations of logical expressions
  • posteo.de: no specification of arbitrary mail filters
  • set up a mail server on Synology DSM 5.0 (no mail filter specification in the GUI, but possibly with configuration file - I've got to look into this)
  • researched mail clients for Android 4.x:
  • researched mail clients for Linux:
  • avelsieve plugin for squirrelmail: possibly interesing, not researched
  • For local solutions, do you restrict the operating system? – unor Aug 1 '14 at 8:06
  • I am almost certain procmail is turing complete, and can do all this and more -- if you have access to your mail server. en.wikipedia.org/wiki/Procmail However I am no expert on procmail. It might even work on client end. Really need to know your OS, and also comfortableness with editing text config files. – Lyndon White Aug 1 '14 at 10:04
  • Please be more specific about your criteria. Applications like Thunderbird, KMail, Outlook, etc. all support local filtering. For e.g. mutt, which can't do it natively, procmail (already mentioned) is recommended. – sebix Aug 3 '14 at 12:42

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