milter manager is a milter to use multiple milters effectively.
If milter manager is introduced, milter manager administrates milters instead of MTA. The has some advantages:
A bug fix release of 1.8.9.
=== milter-test-server
==== Improvements
* Support multiline header
=== Ruby milter
==== Fixes
* Fix a bug that reject/temporary failure on envelope recipient
calls reset.