Update postfix to 2.8.6.  From release announce:

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/.


(taca)