+ 4.6 Using the sidebar .............................................. 58
+ 4.7 External Address Queries ....................................... 59
+ 4.8 Mailbox Formats ................................................ 59
+ 4.9 Mailbox Shortcuts .............................................. 60
+ 4.10 Handling Mailing Lists ......................................... 60
+ 4.11 Editing threads ................................................ 62
+ 4.11.1 Linking threads 62
+ 4.11.2 Breaking threads 62
+ 4.12 Delivery Status Notification (DSN) Support ..................... 62
+ 4.13 POP3 Support (OPTIONAL) ........................................ 63
+ 4.14 IMAP Support (OPTIONAL) ........................................ 64
+ 4.14.1 The Folder Browser 64
+ 4.14.2 Authentication 65
+ 4.15 NNTP Support (OPTIONAL) ........................................ 65
+ 4.15.1 Again: Scoring 66
+ 4.16 SMTP Support (OPTIONAL) ........................................ 66
+ 4.17 Managing multiple IMAP/POP/NNTP accounts (OPTIONAL) ............ 67
+ 4.18 Start a WWW Browser on URLs (EXTERNAL) ......................... 67
+ 4.19 Compressed folders Support (OPTIONAL) .......................... 68
+ 4.19.1 Open a compressed mailbox for reading 68
+ 4.19.2 Write a compressed mailbox 69
+ 4.19.3 Append a message to a compressed mailbox 69
+ 4.19.4 Encrypted folders 70
+
+ 5. Mutt-ng's MIME Support ............................................... 70
+ 5.1 Using MIME in Mutt ............................................. 70
+ 5.1.1 Viewing MIME messages in the pager 71
+ 5.1.2 The Attachment Menu 71
+ 5.1.3 The Compose Menu 71
+ 5.2 MIME Type configuration with mime.types ........................ 72
+ 5.3 MIME Viewer configuration with mailcap ......................... 72
+ 5.3.1 The Basics of the mailcap file 73
+ 5.3.2 Secure use of mailcap 74
+ 5.3.3 Advanced mailcap Usage 75
+ 5.3.4 Example mailcap files 77
+ 5.4 MIME Autoview .................................................. 78
+ 5.5 MIME Multipart/Alternative ..................................... 79
+ 5.6 MIME Lookup .................................................... 79
+
+ 6. Security Considerations ............................................ 80
+ 6.1 Passwords .................................................. 80
+ 6.2 Temporary Files ............................................ 80
+ 6.3 Information Leaks ............................................ 81
+ 6.3.1 Message-ID: headers 81
+ 6.3.2 mailto:-style links 81
+ 6.4 External applications ...................................... 81
+ 6.4.1 mailcap 81
+ 6.4.2 Other 82
+
+ 7. Reference ............................................................ 82
+ 7.1 Command line options ........................................... 82
+ 7.2 Patterns ....................................................... 83
+ 7.3 Configuration Commands ......................................... 85
+
+ iii
+
+ 7.4 Configuration variables .......................................... 87
+ 7.4.1 abort_noattach 88
+ 7.4.2 abort_nosubject 89
+ 7.4.3 abort_unmodified 89
+ 7.4.4 agent_string 89
+ 7.4.5 alias_file 89
+ 7.4.6 alias_format 89
+ 7.4.7 allow_8bit 90
+ 7.4.8 allow_ansi 90
+ 7.4.9 arrow_cursor 90
+ 7.4.10 ascii_chars 91
+ 7.4.11 askbcc 91
+ 7.4.12 askcc 91
+ 7.4.13 assumed_charset 91
+ 7.4.14 attach_format 91
+ 7.4.15 attach_remind_regexp 92
+ 7.4.16 attach_sep 93
+ 7.4.17 attach_split 93
+ 7.4.18 attribution 93
+ 7.4.19 auto_tag 93
+ 7.4.20 autoedit 93
+ 7.4.21 beep 94
+ 7.4.22 beep_new 94
+ 7.4.23 bounce 94
+ 7.4.24 bounce_delivered 94
+ 7.4.25 braille_friendly 94
+ 7.4.26 certificate_file 95
+ 7.4.27 charset 95
+ 7.4.28 check_new 95
+ 7.4.29 collapse_unread 95
+ 7.4.30 compose_format 96
+ 7.4.31 config_charset 96
+ 7.4.32 confirmappend 96
+ 7.4.33 confirmcreate 96
+ 7.4.34 connect_timeout 96
+ 7.4.35 content_type 97
+ 7.4.36 copy 97
+ 7.4.37 crypt_autoencrypt 97
+ 7.4.38 crypt_autopgp 97
+ 7.4.39 crypt_autosign 98
+ 7.4.40 crypt_autosmime 98
+ 7.4.41 crypt_replyencrypt 98
+ 7.4.42 crypt_replysign 98
+ 7.4.43 crypt_replysignencrypted 98
+ 7.4.44 crypt_timestamp 99
+ 7.4.45 crypt_use_gpgme 99
+ 7.4.46 crypt_verify_sig 99
+ 7.4.47 date_format 99
+ 7.4.48 debug_level 100
+ 7.4.49 default_hook 100
+ 7.4.50 delete 100
+ 7.4.51 delete_space 100
+ 7.4.52 delete_untag 101
+
+ iv
+
+ 7.4.53 digest_collapse 101
+ 7.4.54 display_filter 101
+ 7.4.55 dotlock_program 101
+ 7.4.56 dsn_notify 101
+ 7.4.57 dsn_return 102
+ 7.4.58 duplicate_threads 102
+ 7.4.59 edit_headers 102
+ 7.4.60 editor 102
+ 7.4.61 editor_headers 102
+ 7.4.62 encode_from 103
+ 7.4.63 entropy_file 103
+ 7.4.64 envelope_from 103
+ 7.4.65 escape 103
+ 7.4.66 fast_reply 104
+ 7.4.67 fcc_attach 104
+ 7.4.68 fcc_clear 104
+ 7.4.69 file_charset 104
+ 7.4.70 folder 104
+ 7.4.71 folder_format 105
+ 7.4.72 followup_to 106
+ 7.4.73 force_buffy_check 106
+ 7.4.74 force_name 106
+ 7.4.75 forward_decode 106
+ 7.4.76 forward_decrypt 107
+ 7.4.77 forward_edit 107
+ 7.4.78 forward_format 107
+ 7.4.79 forward_quote 107
+ 7.4.80 from 107
+ 7.4.81 gecos_mask 108
+ 7.4.82 hdrs 108
+ 7.4.83 header 108
+ 7.4.84 header_cache 108
+ 7.4.85 header_cache_compress 109
+ 7.4.86 help 109
+ 7.4.87 hidden_host 109
+ 7.4.88 hide_limited 109
+ 7.4.89 hide_missing 109
+ 7.4.90 hide_thread_subject 110
+ 7.4.91 hide_top_limited 110
+ 7.4.92 hide_top_missing 110
+ 7.4.93 history 110
+ 7.4.94 honor_followup_to 110
+ 7.4.95 hostname 111
+ 7.4.96 ignore_list_reply_to 111
+ 7.4.97 imap_authenticators 111
+ 7.4.98 imap_check_subscribed 111
+ 7.4.99 imap_delim_chars 112
+ 7.4.100 imap_headers 112
+ 7.4.101 imap_home_namespace 112
+ 7.4.102 imap_keepalive 112
+ 7.4.103 imap_list_subscribed 113
+ 7.4.104 imap_login 113
+ 7.4.105 imap_mail_check 113
+
+ v
+
+ 7.4.106 imap_pass 113
+ 7.4.107 imap_passive 114
+ 7.4.108 imap_peek 114
+ 7.4.109 imap_reconnect 114
+ 7.4.110 imap_servernoise 114
+ 7.4.111 imap_user 115
+ 7.4.112 implicit_autoview 115
+ 7.4.113 include 115
+ 7.4.114 include_onlyfirst 115
+ 7.4.115 indent_string 115
+ 7.4.116 index_format 115
+ 7.4.117 ispell 118
+ 7.4.118 keep_flagged 118
+ 7.4.119 list_reply 119
+ 7.4.120 locale 119
+ 7.4.121 mail_check 119
+ 7.4.122 mailcap_path 119
+ 7.4.123 mailcap_sanitize 119
+ 7.4.124 maildir_header_cache_verify 119
+ 7.4.125 maildir_trash 120
+ 7.4.126 mark_old 120
+ 7.4.127 markers 120
+ 7.4.128 mask 120
+ 7.4.129 max_display_recips 121
+ 7.4.130 max_line_length 121
+ 7.4.131 mbox 121
+ 7.4.132 mbox_type 121
+ 7.4.133 menu_context 121
+ 7.4.134 menu_move_off 122
+ 7.4.135 menu_scroll 122
+ 7.4.136 message_format 122
+ 7.4.137 meta_key 122
+ 7.4.138 metoo 122
+ 7.4.139 mh_purge 123
+ 7.4.140 mh_seq_flagged 123
+ 7.4.141 mh_seq_replied 123
+ 7.4.142 mh_seq_unseen 123
+ 7.4.143 mime_forward 123
+ 7.4.144 mime_forward_decode 123
+ 7.4.145 mime_forward_rest 124
+ 7.4.146 mix_entry_format 124
+ 7.4.147 mixmaster 124
+ 7.4.148 move 124
+ 7.4.149 msgid_format 125
+ 7.4.150 muttng_bindir 126
+ 7.4.151 muttng_docdir 126
+ 7.4.152 muttng_hcache_backend 126
+ 7.4.153 muttng_revision 126
+ 7.4.154 muttng_sysconfdir 126
+ 7.4.155 muttng_version 127
+ 7.4.156 narrow_tree 127
+ 7.4.157 nntp_ask_followup_to 127
+ 7.4.158 nntp_ask_x_comment_to 127
+
+ vi
+
+ 7.4.159 nntp_cache_dir 127
+ 7.4.160 nntp_catchup 128
+ 7.4.161 nntp_context 128
+ 7.4.162 nntp_followup_to_poster 128
+ 7.4.163 nntp_group_index_format 128
+ 7.4.164 nntp_host 129
+ 7.4.165 nntp_inews 129
+ 7.4.166 nntp_load_description 129
+ 7.4.167 nntp_mail_check 130
+ 7.4.168 nntp_mime_subject 130
+ 7.4.169 nntp_newsrc 130
+ 7.4.170 nntp_pass 130
+ 7.4.171 nntp_post_moderated 131
+ 7.4.172 nntp_reconnect 131
+ 7.4.173 nntp_save_unsubscribed 131
+ 7.4.174 nntp_show_new_news 131
+ 7.4.175 nntp_show_only_unread 132
+ 7.4.176 nntp_user 132
+ 7.4.177 nntp_x_comment_to 132
+ 7.4.178 operating_system 132
+ 7.4.179 pager 132
+ 7.4.180 pager_context 133
+ 7.4.181 pager_format 133
+ 7.4.182 pager_index_lines 133
+ 7.4.183 pager_stop 133
+ 7.4.184 pgp_auto_decode 134
+ 7.4.185 pgp_autoinline 134
+ 7.4.186 pgp_check_exit 134
+ 7.4.187 pgp_clearsign_command 134
+ 7.4.188 pgp_decode_command 135
+ 7.4.189 pgp_decrypt_command 135
+ 7.4.190 pgp_encrypt_only_command 135
+ 7.4.191 pgp_encrypt_sign_command 135
+ 7.4.192 pgp_entry_format 136
+ 7.4.193 pgp_export_command 136
+ 7.4.194 pgp_getkeys_command 136
+ 7.4.195 pgp_good_sign 137
+ 7.4.196 pgp_ignore_subkeys 137
+ 7.4.197 pgp_import_command 137
+ 7.4.198 pgp_list_pubring_command 137
+ 7.4.199 pgp_list_secring_command 137
+ 7.4.200 pgp_long_ids 138
+ 7.4.201 pgp_mime_auto 138
+ 7.4.202 pgp_replyinline 138
+ 7.4.203 pgp_retainable_sigs 138
+ 7.4.204 pgp_show_unusable 139
+ 7.4.205 pgp_sign_as 139
+ 7.4.206 pgp_sign_command 139
+ 7.4.207 pgp_sort_keys 139
+ 7.4.208 pgp_strict_enc 140
+ 7.4.209 pgp_timeout 140
+ 7.4.210 pgp_use_gpg_agent 140
+ 7.4.211 pgp_verify_command 140
+
+ vii
+
+ 7.4.212 pgp_verify_key_command 140
+ 7.4.213 pipe_decode 140
+ 7.4.214 pipe_sep 141
+ 7.4.215 pipe_split 141
+ 7.4.216 pop_auth_try_all 141
+ 7.4.217 pop_authenticators 141
+ 7.4.218 pop_delete 142
+ 7.4.219 pop_host 142
+ 7.4.220 pop_last 142
+ 7.4.221 pop_mail_check 142
+ 7.4.222 pop_pass 143
+ 7.4.223 pop_reconnect 143
+ 7.4.224 pop_user 143
+ 7.4.225 post_indent_string 143
+ 7.4.226 postpone 143
+ 7.4.227 postponed 144
+ 7.4.228 preconnect 144
+ 7.4.229 print 144
+ 7.4.230 print_command 144
+ 7.4.231 print_decode 144
+ 7.4.232 print_split 145
+ 7.4.233 prompt_after 145
+ 7.4.234 query_command 145
+ 7.4.235 quit 145
+ 7.4.236 quote_empty 146
+ 7.4.237 quote_quoted 146
+ 7.4.238 quote_regexp 146
+ 7.4.239 read_inc 146
+ 7.4.240 read_only 146
+ 7.4.241 realname 147
+ 7.4.242 recall 147
+ 7.4.243 record 147
+ 7.4.244 reply_regexp 147
+ 7.4.245 reply_self 148
+ 7.4.246 reply_to 148
+ 7.4.247 resolve 148
+ 7.4.248 reverse_alias 148
+ 7.4.249 reverse_name 149
+ 7.4.250 reverse_realname 149
+ 7.4.251 rfc2047_parameters 149
+ 7.4.252 save_address 149
+ 7.4.253 save_empty 150
+ 7.4.254 save_name 150
+ 7.4.255 score 150
+ 7.4.256 score_threshold_delete 150
+ 7.4.257 score_threshold_flag 151
+ 7.4.258 score_threshold_read 151
+ 7.4.259 send_charset 151
+ 7.4.260 sendmail 151
+ 7.4.261 sendmail_wait 151
+ 7.4.262 shell 152
+ 7.4.263 sidebar_boundary 152
+ 7.4.264 sidebar_delim 152
+
+ viii
+
+ 7.4.265 sidebar_newmail_only 152
+ 7.4.266 sidebar_number_format 152
+ 7.4.267 sidebar_shorten_hierarchy 153
+ 7.4.268 sidebar_visible 153
+ 7.4.269 sidebar_width 154
+ 7.4.270 sig_dashes 154
+ 7.4.271 sig_on_top 154
+ 7.4.272 signature 154
+ 7.4.273 signoff_string 154
+ 7.4.274 simple_search 155
+ 7.4.275 sleep_time 155
+ 7.4.276 smart_wrap 155
+ 7.4.277 smileys 155
+ 7.4.278 smime_ask_cert_label 155
+ 7.4.279 smime_ca_location 156
+ 7.4.280 smime_certificates 156
+ 7.4.281 smime_decrypt_command 156
+ 7.4.282 smime_decrypt_use_default_key 157
+ 7.4.283 smime_default_key 157
+ 7.4.284 smime_encrypt_command 157
+ 7.4.285 smime_encrypt_with 157
+ 7.4.286 smime_get_cert_command 158
+ 7.4.287 smime_get_cert_email_command 158
+ 7.4.288 smime_get_signer_cert_command 158
+ 7.4.289 smime_import_cert_command 158
+ 7.4.290 smime_is_default 158
+ 7.4.291 smime_keys 158
+ 7.4.292 smime_pk7out_command 159
+ 7.4.293 smime_sign_command 159
+ 7.4.294 smime_sign_opaque_command 159
+ 7.4.295 smime_timeout 159
+ 7.4.296 smime_verify_command 159
+ 7.4.297 smime_verify_opaque_command 160
+ 7.4.298 smtp_envelope 160
+ 7.4.299 smtp_host 160
+ 7.4.300 smtp_pass 160
+ 7.4.301 smtp_port 161
+ 7.4.302 smtp_use_tls 161
+ 7.4.303 smtp_user 161
+ 7.4.304 sort 161
+ 7.4.305 sort_alias 162
+ 7.4.306 sort_aux 162
+ 7.4.307 sort_browser 163
+ 7.4.308 sort_re 163
+ 7.4.309 spam_separator 163
+ 7.4.310 spoolfile 163
+ 7.4.311 ssl_ca_certificates_file 164
+ 7.4.312 ssl_client_cert 164
+ 7.4.313 ssl_force_tls 164
+ 7.4.314 ssl_min_dh_prime_bits 164
+ 7.4.315 ssl_starttls 164
+ 7.4.316 ssl_use_sslv2 165
+ 7.4.317 ssl_use_sslv3 165
+
+ ix
+
+ 7.4.318 ssl_use_tlsv1 165
+ 7.4.319 ssl_usesystemcerts 165
+ 7.4.320 status_chars 165
+ 7.4.321 status_format 166
+ 7.4.322 status_on_top 168
+ 7.4.323 strict_mailto 168
+ 7.4.324 strict_mime 168
+ 7.4.325 strict_threads 169
+ 7.4.326 strip_was 169
+ 7.4.327 strip_was_regex 169
+ 7.4.328 stuff_quoted 169
+ 7.4.329 suspend 170
+ 7.4.330 text_flowed 170
+ 7.4.331 thorough_search 170
+ 7.4.332 thread_received 170
+ 7.4.333 tilde 170
+ 7.4.334 timeout 171
+ 7.4.335 tmpdir 171
+ 7.4.336 to_chars 171
+ 7.4.337 trash 171
+ 7.4.338 tunnel 171
+ 7.4.339 umask 172
+ 7.4.340 uncollapse_jump 172
+ 7.4.341 use_8bitmime 172
+ 7.4.342 use_domain 172
+ 7.4.343 use_from 172
+ 7.4.344 use_idn 173
+ 7.4.345 use_ipv6 173
+ 7.4.346 visual 173
+ 7.4.347 wait_key 173
+ 7.4.348 weed 174
+ 7.4.349 wrap_search 174
+ 7.4.350 wrapmargin 174
+ 7.4.351 write_bcc 174
+ 7.4.352 write_inc 174
+ 7.4.353 xterm_icon 174
+ 7.4.354 xterm_leave 175
+ 7.4.355 xterm_set_titles 175
+ 7.4.356 xterm_title 175
+ 7.5 Functions ....................................................... 175
+ 7.5.1 generic 175
+ 7.5.2 index 176
+ 7.5.3 pager 178
+ 7.5.4 alias 180
+ 7.5.5 query 180
+ 7.5.6 attach 180
+ 7.5.7 compose 181
+ 7.5.8 postpone 182
+ 7.5.9 browser 182
+ 7.5.10 pgp 183
+ 7.5.11 editor 183
+
+ 8. Miscellany ............................................................ 183
+
+ x
+
+ 8.1 Acknowledgments ................................................. 184
+ 8.2 About this document ............................................. 186
+
+ xi
+