syn keyword muttrcVarBool contained sig_dashes sig_on_top smart_wrap sort_re ssl_use_sslv2 ssl_use_sslv3 ssl_use_tlsv1
syn keyword muttrcVarBool contained ssl_usesystemcerts status_on_top strict_threads suspend text_flowed thorough_search
syn keyword muttrcVarBool contained thread_received tilde uncollapse_jump use_8bitmime use_domain use_from use_ipv6
-syn keyword muttrcVarBool contained user_agent wait_key weed wrap_search write_bcc
+syn keyword muttrcVarBool contained agent_string wait_key weed wrap_search write_bcc
syn keyword muttrcVarBool contained noallow_8bit noallow_ansi noarrow_cursor noascii_chars noaskbcc noaskcc
syn keyword muttrcVarBool contained noattach_split noauto_tag noautoedit nobeep nobeep_new nobounce_delivered
syn keyword muttrcVarStr contained sort_aux sort_browser spoolfile status_chars status_format tmpdir to_chars tunnel visual
" start mutt-ng specific keywords
-syn keyword muttrcVarStr contained assumed_charset file_charset nntp_group_index_format header_cache indent_stringing nntp_inews
+syn keyword muttrcVarStr contained assumed_charset file_charset nntp_group_index_format header_cache indent_string nntp_inews
syn keyword muttrcVarStr contained msgid_format nntp_pass nntp_cache_dir nntp_host nntp_newsrc nntp_user operating_system
syn keyword muttrcVarStr contained sidebar_delim signoff_string smtp_pass smtp_user smtp_host xterm_icon
syn keyword muttrcVarStr contained xterm_title