The keys used are:
!: modified feature, -: deleted feature, +: new feature
-default (unreleased):
+1.6.0 (unreleased):
+
+ + Enabled utf-8 mailbox support for IMAP.
+ New expandos %r and %R for comma separated list of To: and Cc:
- recipients respectively
+ recipients respectively.
+ + Improved support for internationalized email and SMTPUTF8 (RFC653[0-3]).
+ ! $use_idn has been renamed to $idn_decode.
+ + $idn_encode controls whether outgoing email address domains will
+ be IDNA encoded. If your MTA supports it, unset to use utf-8
+ email address domains.
+ + The S/MIME message digest algorithm is now specified using the
+ option $smime_sign_digest_alg. Note that $smime_sign_command
+ should be modified to include "-md %d". Please see
+ contrib/smime.rc.
+ + $reflow_space_quotes allows format=flowed email quotes to be
+ displayed with spacing between them.
+ ! multipart draft files are now supported.
+ + The "-E" command line argument causes mutt to edit draft or include files.
+ All changes made in mutt will be saved back out to those files.
+ + $resume_draft_files and $resume_edited_draft_files control how
+ mutt processes draft files.
+ + For classic gpg mode, $pgp_decryption_okay should be set to verify
+ multipart/encrypted are actually encrypted. Please see
+ contrib/gpg.rc for the suggested value.
+ ! mailto URL header parameters by default are now restricted to
+ 'body' and 'subject'.
+ + mailto_allow and unmailto_allow can be used to add or remove
+ allowed mailto header parameters.
+ ! The method of setting $hostname has been changed. Rather than
+ scanning /etc/resolv.conf, the domain will now be determined using
+ DNS calls.
1.5.24 (2015-08-31):