+ 4.6 Using the sidebar .............................................. 58
+ 4.7 External Address Queries ....................................... 59
+ 4.8 Mailbox Formats ................................................ 60
+ 4.9 Mailbox Shortcuts .............................................. 61
+ 4.10 Handling Mailing Lists ......................................... 61
+ 4.11 Editing threads ................................................ 62
+ 4.11.1 Linking threads 63
+ 4.11.2 Breaking threads 63
+ 4.12 Delivery Status Notification (DSN) Support ..................... 63
+ 4.13 POP3 Support (OPTIONAL) ........................................ 63
+ 4.14 IMAP Support (OPTIONAL) ........................................ 64
+ 4.14.1 The Folder Browser 65
+ 4.14.2 Authentication 65
+ 4.15 NNTP Support (OPTIONAL) ........................................ 66
+ 4.15.1 Again: Scoring 66
+ 4.16 SMTP Support (OPTIONAL) ........................................ 67
+ 4.17 Managing multiple IMAP/POP/NNTP accounts (OPTIONAL) ............ 68
+ 4.18 Start a WWW Browser on URLs (EXTERNAL) ......................... 68
+ 4.19 Compressed folders Support (OPTIONAL) .......................... 68
+ 4.19.1 Open a compressed mailbox for reading 69
+ 4.19.2 Write a compressed mailbox 69
+ 4.19.3 Append a message to a compressed mailbox 70
+ 4.19.4 Encrypted folders 71
+
+ 5. Mutt-ng's MIME Support ............................................... 71
+ 5.1 Using MIME in Mutt ............................................. 71
+ 5.1.1 Viewing MIME messages in the pager 71
+ 5.1.2 The Attachment Menu 72
+ 5.1.3 The Compose Menu 72
+ 5.2 MIME Type configuration with mime.types ........................ 72
+ 5.3 MIME Viewer configuration with mailcap ......................... 73
+ 5.3.1 The Basics of the mailcap file 74
+ 5.3.2 Secure use of mailcap 75
+ 5.3.3 Advanced mailcap Usage 75
+ 5.3.4 Example mailcap files 78
+ 5.4 MIME Autoview .................................................. 79
+ 5.5 MIME Multipart/Alternative ..................................... 80
+ 5.6 MIME Lookup .................................................... 80
+
+ 6. Security Considerations ............................................ 81
+ 6.1 Passwords .................................................. 81
+ 6.2 Temporary Files ............................................ 81
+ 6.3 Information Leaks ............................................ 81
+ 6.3.1 Message-ID: headers 81
+ 6.3.2 mailto:-style links 82
+ 6.4 External applications ...................................... 82
+ 6.4.1 mailcap 82
+ 6.4.2 Other 83
+
+ 7. Reference ............................................................ 83
+ 7.1 Command line options ........................................... 83
+ 7.2 Patterns ....................................................... 84
+ 7.3 Configuration Commands ......................................... 86
+
+ iii
+
+ 7.4 Configuration variables .......................................... 88
+ 7.4.1 abort_noattach 89
+ 7.4.2 abort_nosubject 90
+ 7.4.3 abort_unmodified 90
+ 7.4.4 agent_string 90
+ 7.4.5 alias_file 90
+ 7.4.6 alias_format 90
+ 7.4.7 allow_8bit 91
+ 7.4.8 allow_ansi 91
+ 7.4.9 arrow_cursor 91
+ 7.4.10 ascii_chars 92
+ 7.4.11 askbcc 92
+ 7.4.12 askcc 92
+ 7.4.13 assumed_charset 92
+ 7.4.14 attach_format 92
+ 7.4.15 attach_remind_regexp 93
+ 7.4.16 attach_sep 94
+ 7.4.17 attach_split 94
+ 7.4.18 attribution 94
+ 7.4.19 auto_tag 94
+ 7.4.20 autoedit 94
+ 7.4.21 beep 95
+ 7.4.22 beep_new 95
+ 7.4.23 bounce 95
+ 7.4.24 bounce_delivered 95
+ 7.4.25 braille_friendly 95
+ 7.4.26 certificate_file 96
+ 7.4.27 charset 96
+ 7.4.28 check_new 96
+ 7.4.29 collapse_unread 96
+ 7.4.30 compose_format 97
+ 7.4.31 config_charset 97
+ 7.4.32 confirmappend 97
+ 7.4.33 confirmcreate 97
+ 7.4.34 connect_timeout 97
+ 7.4.35 content_type 98
+ 7.4.36 copy 98
+ 7.4.37 crypt_autoencrypt 98
+ 7.4.38 crypt_autopgp 98
+ 7.4.39 crypt_autosign 99
+ 7.4.40 crypt_autosmime 99
+ 7.4.41 crypt_replyencrypt 99
+ 7.4.42 crypt_replysign 99
+ 7.4.43 crypt_replysignencrypted 99
+ 7.4.44 crypt_timestamp 100
+ 7.4.45 crypt_use_gpgme 100
+ 7.4.46 crypt_verify_sig 100
+ 7.4.47 date_format 100
+ 7.4.48 debug_level 101
+ 7.4.49 default_hook 101
+ 7.4.50 delete 101
+ 7.4.51 delete_space 101
+ 7.4.52 delete_untag 102
+
+ iv
+
+ 7.4.53 digest_collapse 102
+ 7.4.54 display_filter 102
+ 7.4.55 dotlock_program 102
+ 7.4.56 dsn_notify 102
+ 7.4.57 dsn_return 103
+ 7.4.58 duplicate_threads 103
+ 7.4.59 edit_headers 103
+ 7.4.60 editor 103
+ 7.4.61 editor_headers 103
+ 7.4.62 encode_from 104
+ 7.4.63 entropy_file 104
+ 7.4.64 envelope_from 104
+ 7.4.65 escape 104
+ 7.4.66 fast_reply 105
+ 7.4.67 fcc_attach 105
+ 7.4.68 fcc_clear 105
+ 7.4.69 file_charset 105
+ 7.4.70 folder 105
+ 7.4.71 folder_format 106
+ 7.4.72 followup_to 107
+ 7.4.73 force_buffy_check 107
+ 7.4.74 force_name 107
+ 7.4.75 forward_decode 107
+ 7.4.76 forward_decrypt 108
+ 7.4.77 forward_edit 108
+ 7.4.78 forward_format 108
+ 7.4.79 forward_quote 108
+ 7.4.80 from 108
+ 7.4.81 gecos_mask 109
+ 7.4.82 hdrs 109
+ 7.4.83 header 109
+ 7.4.84 header_cache 109
+ 7.4.85 header_cache_compress 110
+ 7.4.86 help 110
+ 7.4.87 hidden_host 110
+ 7.4.88 hide_limited 110
+ 7.4.89 hide_missing 110
+ 7.4.90 hide_thread_subject 111
+ 7.4.91 hide_top_limited 111
+ 7.4.92 hide_top_missing 111
+ 7.4.93 history 111
+ 7.4.94 honor_followup_to 111
+ 7.4.95 hostname 112
+ 7.4.96 ignore_list_reply_to 112
+ 7.4.97 imap_authenticators 112
+ 7.4.98 imap_check_subscribed 112
+ 7.4.99 imap_delim_chars 113
+ 7.4.100 imap_headers 113
+ 7.4.101 imap_home_namespace 113
+ 7.4.102 imap_keepalive 113
+ 7.4.103 imap_list_subscribed 114
+ 7.4.104 imap_login 114
+ 7.4.105 imap_mail_check 114
+
+ v
+
+ 7.4.106 imap_pass 114
+ 7.4.107 imap_passive 115
+ 7.4.108 imap_peek 115
+ 7.4.109 imap_reconnect 115
+ 7.4.110 imap_servernoise 115
+ 7.4.111 imap_user 116
+ 7.4.112 implicit_autoview 116
+ 7.4.113 include 116
+ 7.4.114 include_onlyfirst 116
+ 7.4.115 indent_string 116
+ 7.4.116 index_format 116
+ 7.4.117 ispell 119
+ 7.4.118 keep_flagged 119
+ 7.4.119 list_reply 120
+ 7.4.120 locale 120
+ 7.4.121 mail_check 120
+ 7.4.122 mailcap_path 120
+ 7.4.123 mailcap_sanitize 120
+ 7.4.124 maildir_header_cache_verify 120
+ 7.4.125 maildir_trash 121
+ 7.4.126 mark_old 121
+ 7.4.127 markers 121
+ 7.4.128 mask 121
+ 7.4.129 max_display_recips 122
+ 7.4.130 max_line_length 122
+ 7.4.131 mbox 122
+ 7.4.132 mbox_type 122
+ 7.4.133 menu_context 122
+ 7.4.134 menu_move_off 123
+ 7.4.135 menu_scroll 123
+ 7.4.136 message_format 123
+ 7.4.137 meta_key 123
+ 7.4.138 metoo 123
+ 7.4.139 mh_purge 124
+ 7.4.140 mh_seq_flagged 124
+ 7.4.141 mh_seq_replied 124
+ 7.4.142 mh_seq_unseen 124
+ 7.4.143 mime_forward 124
+ 7.4.144 mime_forward_decode 124
+ 7.4.145 mime_forward_rest 125
+ 7.4.146 mix_entry_format 125
+ 7.4.147 mixmaster 125
+ 7.4.148 move 125
+ 7.4.149 msgid_format 126
+ 7.4.150 muttng_bindir 127
+ 7.4.151 muttng_docdir 127
+ 7.4.152 muttng_folder_name 127
+ 7.4.153 muttng_folder_path 127
+ 7.4.154 muttng_hcache_backend 127
+ 7.4.155 muttng_pwd 128
+ 7.4.156 muttng_revision 128
+ 7.4.157 muttng_sysconfdir 128
+ 7.4.158 muttng_version 128
+
+ vi
+
+ 7.4.159 narrow_tree 128
+ 7.4.160 nntp_ask_followup_to 128
+ 7.4.161 nntp_ask_x_comment_to 129
+ 7.4.162 nntp_cache_dir 129
+ 7.4.163 nntp_catchup 129
+ 7.4.164 nntp_context 129
+ 7.4.165 nntp_followup_to_poster 129
+ 7.4.166 nntp_group_index_format 130
+ 7.4.167 nntp_host 130
+ 7.4.168 nntp_inews 131
+ 7.4.169 nntp_load_description 131
+ 7.4.170 nntp_mail_check 131
+ 7.4.171 nntp_mime_subject 131
+ 7.4.172 nntp_newsrc 132
+ 7.4.173 nntp_pass 132
+ 7.4.174 nntp_post_moderated 132
+ 7.4.175 nntp_reconnect 132
+ 7.4.176 nntp_save_unsubscribed 133
+ 7.4.177 nntp_show_new_news 133
+ 7.4.178 nntp_show_only_unread 133
+ 7.4.179 nntp_user 133
+ 7.4.180 nntp_x_comment_to 133
+ 7.4.181 operating_system 134
+ 7.4.182 pager 134
+ 7.4.183 pager_context 134
+ 7.4.184 pager_format 134
+ 7.4.185 pager_index_lines 135
+ 7.4.186 pager_stop 135
+ 7.4.187 pgp_auto_decode 135
+ 7.4.188 pgp_autoinline 135
+ 7.4.189 pgp_check_exit 136
+ 7.4.190 pgp_clearsign_command 136
+ 7.4.191 pgp_decode_command 136
+ 7.4.192 pgp_decrypt_command 137
+ 7.4.193 pgp_encrypt_only_command 137
+ 7.4.194 pgp_encrypt_sign_command 137
+ 7.4.195 pgp_entry_format 137
+ 7.4.196 pgp_export_command 138
+ 7.4.197 pgp_getkeys_command 138
+ 7.4.198 pgp_good_sign 138
+ 7.4.199 pgp_ignore_subkeys 138
+ 7.4.200 pgp_import_command 138
+ 7.4.201 pgp_list_pubring_command 139
+ 7.4.202 pgp_list_secring_command 139
+ 7.4.203 pgp_long_ids 139
+ 7.4.204 pgp_mime_auto 139
+ 7.4.205 pgp_replyinline 139
+ 7.4.206 pgp_retainable_sigs 140
+ 7.4.207 pgp_show_unusable 140
+ 7.4.208 pgp_sign_as 140
+ 7.4.209 pgp_sign_command 140
+ 7.4.210 pgp_sort_keys 141
+ 7.4.211 pgp_strict_enc 141
+
+ vii
+
+ 7.4.212 pgp_timeout 141
+ 7.4.213 pgp_use_gpg_agent 141
+ 7.4.214 pgp_verify_command 142
+ 7.4.215 pgp_verify_key_command 142
+ 7.4.216 pipe_decode 142
+ 7.4.217 pipe_sep 142
+ 7.4.218 pipe_split 142
+ 7.4.219 pop_auth_try_all 142
+ 7.4.220 pop_authenticators 143
+ 7.4.221 pop_delete 143
+ 7.4.222 pop_host 143
+ 7.4.223 pop_last 144
+ 7.4.224 pop_mail_check 144
+ 7.4.225 pop_pass 144
+ 7.4.226 pop_reconnect 144
+ 7.4.227 pop_user 144
+ 7.4.228 post_indent_string 145
+ 7.4.229 postpone 145
+ 7.4.230 postponed 145
+ 7.4.231 preconnect 145
+ 7.4.232 print 146
+ 7.4.233 print_command 146
+ 7.4.234 print_decode 146
+ 7.4.235 print_split 146
+ 7.4.236 prompt_after 146
+ 7.4.237 query_command 147
+ 7.4.238 quit 147
+ 7.4.239 quote_empty 147
+ 7.4.240 quote_quoted 147
+ 7.4.241 quote_regexp 147
+ 7.4.242 read_inc 148
+ 7.4.243 read_only 148
+ 7.4.244 realname 148
+ 7.4.245 recall 148
+ 7.4.246 record 148
+ 7.4.247 reply_regexp 149
+ 7.4.248 reply_self 149
+ 7.4.249 reply_to 149
+ 7.4.250 resolve 149
+ 7.4.251 reverse_alias 150
+ 7.4.252 reverse_name 150
+ 7.4.253 reverse_realname 150
+ 7.4.254 rfc2047_parameters 150
+ 7.4.255 save_address 151
+ 7.4.256 save_empty 151
+ 7.4.257 save_name 151
+ 7.4.258 score 152
+ 7.4.259 score_threshold_delete 152
+ 7.4.260 score_threshold_flag 152
+ 7.4.261 score_threshold_read 152
+ 7.4.262 send_charset 152
+ 7.4.263 sendmail 153
+ 7.4.264 sendmail_wait 153
+
+ viii
+
+ 7.4.265 shell 153
+ 7.4.266 sidebar_boundary 153
+ 7.4.267 sidebar_delim 154
+ 7.4.268 sidebar_newmail_only 154
+ 7.4.269 sidebar_number_format 154
+ 7.4.270 sidebar_shorten_hierarchy 155
+ 7.4.271 sidebar_visible 155
+ 7.4.272 sidebar_width 155
+ 7.4.273 sig_dashes 155
+ 7.4.274 sig_on_top 155
+ 7.4.275 signature 156
+ 7.4.276 signoff_string 156
+ 7.4.277 simple_search 156
+ 7.4.278 sleep_time 156
+ 7.4.279 smart_wrap 157
+ 7.4.280 smileys 157
+ 7.4.281 smime_ask_cert_label 157
+ 7.4.282 smime_ca_location 157
+ 7.4.283 smime_certificates 157
+ 7.4.284 smime_decrypt_command 158
+ 7.4.285 smime_decrypt_use_default_key 158
+ 7.4.286 smime_default_key 158
+ 7.4.287 smime_encrypt_command 159
+ 7.4.288 smime_encrypt_with 159
+ 7.4.289 smime_get_cert_command 159
+ 7.4.290 smime_get_cert_email_command 159
+ 7.4.291 smime_get_signer_cert_command 159
+ 7.4.292 smime_import_cert_command 160
+ 7.4.293 smime_is_default 160
+ 7.4.294 smime_keys 160
+ 7.4.295 smime_pk7out_command 160
+ 7.4.296 smime_sign_command 160
+ 7.4.297 smime_sign_opaque_command 161
+ 7.4.298 smime_timeout 161
+ 7.4.299 smime_verify_command 161
+ 7.4.300 smime_verify_opaque_command 161
+ 7.4.301 smtp_envelope 161
+ 7.4.302 smtp_host 161
+ 7.4.303 smtp_pass 162
+ 7.4.304 smtp_port 162
+ 7.4.305 smtp_use_tls 162
+ 7.4.306 smtp_user 163
+ 7.4.307 sort 163
+ 7.4.308 sort_alias 163
+ 7.4.309 sort_aux 163
+ 7.4.310 sort_browser 164
+ 7.4.311 sort_re 164
+ 7.4.312 spam_separator 165
+ 7.4.313 spoolfile 165
+ 7.4.314 ssl_ca_certificates_file 165
+ 7.4.315 ssl_client_cert 165
+ 7.4.316 ssl_force_tls 165
+ 7.4.317 ssl_min_dh_prime_bits 166
+
+ ix
+
+ 7.4.318 ssl_starttls 166
+ 7.4.319 ssl_use_sslv2 166
+ 7.4.320 ssl_use_sslv3 166
+ 7.4.321 ssl_use_tlsv1 166
+ 7.4.322 ssl_usesystemcerts 167
+ 7.4.323 status_chars 167
+ 7.4.324 status_format 167
+ 7.4.325 status_on_top 169
+ 7.4.326 strict_mailto 170
+ 7.4.327 strict_mime 170
+ 7.4.328 strict_threads 170
+ 7.4.329 strip_was 170
+ 7.4.330 strip_was_regex 171
+ 7.4.331 stuff_quoted 171
+ 7.4.332 suspend 171
+ 7.4.333 text_flowed 171
+ 7.4.334 thorough_search 171
+ 7.4.335 thread_received 172
+ 7.4.336 tilde 172
+ 7.4.337 timeout 172
+ 7.4.338 tmpdir 172
+ 7.4.339 to_chars 172
+ 7.4.340 trash 173
+ 7.4.341 tunnel 173
+ 7.4.342 umask 173
+ 7.4.343 uncollapse_jump 173
+ 7.4.344 use_8bitmime 173
+ 7.4.345 use_domain 174
+ 7.4.346 use_from 174
+ 7.4.347 use_idn 174
+ 7.4.348 use_ipv6 174
+ 7.4.349 visual 174
+ 7.4.350 wait_key 175
+ 7.4.351 weed 175
+ 7.4.352 wrap_search 175
+ 7.4.353 wrapmargin 175
+ 7.4.354 write_bcc 175
+ 7.4.355 write_inc 176
+ 7.4.356 xterm_icon 176
+ 7.4.357 xterm_leave 176
+ 7.4.358 xterm_set_titles 176
+ 7.4.359 xterm_title 176
+ 7.5 Functions ....................................................... 177
+ 7.5.1 generic 177
+ 7.5.2 index 178
+ 7.5.3 pager 180
+ 7.5.4 alias 182
+ 7.5.5 query 182
+ 7.5.6 attach 182
+ 7.5.7 compose 183
+ 7.5.8 postpone 184
+ 7.5.9 browser 184
+ 7.5.10 pgp 185
+
+ x
+
+ 7.5.11 editor 185
+
+ 8. Miscellany ............................................................ 185
+ 8.1 Acknowledgments ................................................. 186
+ 8.2 About this document ............................................. 188
+
+ xi
+