Things to add to the release notes for the next full release:
-- Switched to buffered output when performing TLS encryption in the SMTP
- MTA to increase performance.
-- mh-e support has been changed so that it is always compiled into nmh;
- old features that were previously enabled by the MHE option have been
- garbage collected.
+------------
+NEW FEATURES
+------------
+
+- The default editor has been changed from 'vi' to 'prompter', to align with
+ historical practice and reduce packaging dependencies on external programs.
+- A new -checkbase64 switch to mhfixmsg(1).
+- inc(1)/msgchk(1) now support STARTTLS for the POP protocol.
+
+-----------------
+OBSOLETE FEATURES
+-----------------
+
+- The MIME content cache functionality has been mostly non-functional since
+ the development on nmh, and consequently all of the content caching code
+ and related switches (-cache/-rcache/-wcache) have been removed.
+- Support for generating and reassembling message/partial messags has been
+ removed; it seems that this has been broken since 1.5 and there is very
+ little support across MUAs.
+
+-------------------
+DEPRECATED FEATURES
+-------------------
+
+- The generation and verification of Content-MD5 headers is no longer
+ performed. The -check and -nocheck switches to various nmh programs
+ that would control this functionality still exist, but are non-functional
+ and will be removed in the next release.
+
+---------
+BUG FIXES
+---------
+
+- Fixed bcc to work with sendmail/pipe, and better documented that dcc
+ doesn't work with it [Bug 55700].
+- An -attendee switch has been added to mhical(1), for use when more than one
+ (or zero) attendees match a user's mailbox.
+- Fixed inc(1) and %(me) function escape to not obey Local-Mailbox profile
+ component.