[An on-line version of this announcement will be available at http://www.postfix.org/announcements/postfix-2.8.6.html]
Postfix stable release 2.8.6, 2.7.7, 2.6.13 and 2.5.16 are available. These contain fixes that are also included with the Postfix 2.9 experimental release.
The Postfix SMTP daemon sent "bare" newline characters instead of <CR><LF> when a header_checks REJECT pattern matched multi-line header. This bug was introduced with Postfix 1.1.
The Postfix SMTP daemon sent "bare" newline characters instead of <CR><LF> when an smtpd_proxy_filter returned a multi-line response. This bug was introduced with Postfix 2.1.
For compatibility with future EAI (email address internationalization) implementations, the Postfix MIME processor no longer enforces the strict_mime_encoding_domain check on unknown message subtypes such as message/global*. This check is disabled by default.
The Postfix master daemon could report a panic error ("master_spawn: at process limit") after the process limit for some service was reduced with "postfix reload". This bug existed in all Postfix versions.
You can find the updated Postfix source code at the mirrors listed at http://www.postfix.org/.