TODO

Current activities:

* Update include extension to latest draft (v13 currently):
	- Implement :optional tag.

Parallel plugin-based efforts:

* Implement plugin to pipe messages to external programs. Will probably be
  merged with the main tree eventually.
* Implement enotify xmpp method as a plugin.
* Implement metadata and servermetadata extensions as a plugin.
	- Compiles against dovecot metadata plugin, as currently developed by
	  Dennis Schridde. 

Next (mostly in order of descending priority/precedence):

* Implement index extension
* Add normalize() method to comparators to normalize the string before matching
  (for efficiency).
* Improve error handling. 
	- Implement dropping errors in the user's mailbox as a mail message.
* Further develop regex extension and update it to the latest draft:
	- Implement the :quoteregex set modifier
	- Investigate the use of the TRE regexp library to gain UTF-8 capability
	  (posix regexes actually do support utf8, but only when locale is set
	  accordingly)
* Finish body extension:
	- Implement proper :content "multipart" behavior
	- Build test cases for decoding MIME encodings to UTF-8
* Cleanup the test suite
	- Restructure test scripts
	- Add more comment on purpose of tests
* Finish the ereject extension
* Vacation extension improvements:
	- Implement configurable sender exclusion list.
	- Implement mechanism for implicitly including an account's aliases in the
	  vacation command's :addresses list.
* Fix remaining RFC deviations:
	- Fix issues listed in doc/rfc/RFC-questions.txt based on answers
	- Allow for the existence of dynamic comparators (i.e. specified by 
	  variables). 
	- Verify outgoing mail addresses at runtime when necessary
	  (e.g. after variables substitution)
	- Improve handling of invalid addresses in headers (requires Dovecot changes)
* Properly implement Sieve internationalization support (utf-8 handling), 
  currently it is not complete:
	- Make this implementation fully conform section 2.7.2 of RFC5228 (Comparisons 
	  Across Character Sets). 
	- Verify validity of utf8 where necessary.
	- Implement comparator-i;unicode-casemap.
* Make testsuite much more exhaustive:
	- Add support for testing the content of result actions
	- Test as many error/warning/info conditions as possible. 
	- Review the specification documents and check whether the given requirements
	  are tested at least once.
* Fix ManageSieve proxy to recognize response codes from the backend and forward
  them to the user if appropriate/safe.
* Test ManageSieve behavior thoroughly:
	- Test pipelined behavior
	- Test proxy authentication
* Code cleanup:
	- Make address handling more uniform. 
	- Review all FIXMEs 

* Build a server with test mail accounts that processes lots and lots of mail 
  (e.g. spam, mailing lists etc.)

* ## MAKE A FOURTH MAIN RELEASE (0.4.x) ##

* Implement extlists extension as a plugin
* Enotify extension: detect use of variable values extracted from the message 
  that are used in the method argument. RFC reports this as a security issue.
* Make the sieve storage a base class with (possibly) various implementations, 
  just like mail-storage. This aims to provide support for alternate types
  of script storage like LDAP or SQL database.
* Add support for stream matching for handling large values, e.g. from the body
  extension.
* Implement message modification and extraction API in order to:
	- Implement replace, enclose, foreverypart, mime and extracttext extensions 
* Provide a solution for mail_get_headers_utf8 reparsing the whole message each
  time it is called (header and address test; Timo might provide solution from
  within Dovecot)
* Use lib/str-find.h for :contains and :matches match types 
* Warn during compile if using non-existent folders.

* Implement IMAP plugin for IMAPSieve support:
	- Requires the same Sieve transaction support as the sieve-filter tool needs.
	- Requires (IMAP) metadata support in Dovecot.
	- This may include support for manually running a script on a set of messages
	  through IMAP (no specification for something like this is available; we will 
	  have to provide our own)
* Variables extension: implement compile time evaluation of constant values
	- Detect assignment of too large constant values to variables at compile
	  time.
* Add development documentation, i.e. comment on library functions and document
  the binary and byte-code format. 
* Implement sip-message notify mechanism.