[An on-line version of this announcement will be available at http://www.postfix.org/announcements/postfix-3.0.4.html]
Postfix legacy release 3.0.4 is available.
There is one fix, back-ported from Postfix 3.1:
The Postfix SMTP client would throttle (i.e. reduce concurrency for) a destination after opportunistic TLS failure, causing the affected messages to accumulate in the deferred queue. This problem was introduced with Postfix 3.0.
You can find the updated Postfix source code at the mirrors listed at http://www.postfix.org/.