* Bug (introduced: Postfix 2.3): Postfix Milter client state
was not properly reset after one Milter in a multi-Milter
configuration failed during MAIL FROM, resulting in a Postfix
Milter client panic during the next MAIL FROM command in the
same SMTP session. Reported by WeiYu Wu.
This is also fixed in the upcoming Postfix 3.5.0 stable release and
in the Postfix 3.6 development release.