+ 4.7 External Address Queries ....................................... 58
+ 4.8 Mailbox Formats ................................................ 59
+ 4.9 Mailbox Shortcuts .............................................. 60
+ 4.10 Handling Mailing Lists ......................................... 60
+ 4.11 Editing threads ................................................ 61
+ 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) ........................................ 62
+ 4.14 IMAP Support (OPTIONAL) ........................................ 63
+ 4.14.1 The Folder Browser 64
+ 4.14.2 Authentication 64
+ 4.15 NNTP Support (OPTIONAL) ........................................ 65
+ 4.15.1 Again: Scoring 65
+ 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) .......................... 67
+ 4.19.1 Open a compressed mailbox for reading 68
+ 4.19.2 Write a compressed mailbox 68
+ 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 70
+ 5.1.2 The Attachment Menu 71
+ 5.1.3 The Compose Menu 71
+ 5.2 MIME Type configuration with mime.types ........................ 71
+ 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 74
+ 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 ............................................ 80
+ 6.3.1 Message-ID: headers 80
+ 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
+ 7.4 Configuration variables .......................................... 87
+
+ iii
+
+ 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 default_hook 100
+ 7.4.49 delete 100
+ 7.4.50 delete_space 100
+ 7.4.51 delete_untag 100
+ 7.4.52 digest_collapse 100
+ 7.4.53 display_filter 101
+
+ iv
+
+ 7.4.54 dotlock_program 101
+ 7.4.55 dsn_notify 101
+ 7.4.56 dsn_return 101
+ 7.4.57 duplicate_threads 102
+ 7.4.58 edit_headers 102
+ 7.4.59 editor 102
+ 7.4.60 encode_from 102
+ 7.4.61 entropy_file 102
+ 7.4.62 envelope_from 103
+ 7.4.63 escape 103
+ 7.4.64 fast_reply 103
+ 7.4.65 fcc_attach 103
+ 7.4.66 fcc_clear 103
+ 7.4.67 file_charset 104
+ 7.4.68 folder 104
+ 7.4.69 folder_format 104
+ 7.4.70 followup_to 105
+ 7.4.71 force_buffy_check 105
+ 7.4.72 force_name 106
+ 7.4.73 forward_decode 106
+ 7.4.74 forward_decrypt 106
+ 7.4.75 forward_edit 106
+ 7.4.76 forward_format 106
+ 7.4.77 forward_quote 107
+ 7.4.78 from 107
+ 7.4.79 gecos_mask 107
+ 7.4.80 hdrs 107
+ 7.4.81 header 108
+ 7.4.82 header_cache 108
+ 7.4.83 header_cache_compress 108
+ 7.4.84 help 108
+ 7.4.85 hidden_host 109
+ 7.4.86 hide_limited 109
+ 7.4.87 hide_missing 109
+ 7.4.88 hide_thread_subject 109
+ 7.4.89 hide_top_limited 109
+ 7.4.90 hide_top_missing 109
+ 7.4.91 history 110
+ 7.4.92 honor_followup_to 110
+ 7.4.93 hostname 110
+ 7.4.94 ignore_list_reply_to 110
+ 7.4.95 imap_authenticators 110
+ 7.4.96 imap_check_subscribed 111
+ 7.4.97 imap_delim_chars 111
+ 7.4.98 imap_headers 111
+ 7.4.99 imap_home_namespace 112
+ 7.4.100 imap_keepalive 112
+ 7.4.101 imap_list_subscribed 112
+ 7.4.102 imap_login 112
+ 7.4.103 imap_mail_check 113
+ 7.4.104 imap_pass 113
+ 7.4.105 imap_passive 113
+ 7.4.106 imap_peek 113
+
+ v
+
+ 7.4.107 imap_reconnect 114
+ 7.4.108 imap_servernoise 114
+ 7.4.109 imap_user 114
+ 7.4.110 implicit_autoview 114
+ 7.4.111 include 114
+ 7.4.112 include_onlyfirst 115
+ 7.4.113 indent_string 115
+ 7.4.114 index_format 115
+ 7.4.115 ispell 118
+ 7.4.116 keep_flagged 118
+ 7.4.117 list_reply 118
+ 7.4.118 locale 118
+ 7.4.119 mail_check 118
+ 7.4.120 mailcap_path 119
+ 7.4.121 mailcap_sanitize 119
+ 7.4.122 maildir_header_cache_verify 119
+ 7.4.123 maildir_trash 119
+ 7.4.124 mark_old 119
+ 7.4.125 markers 120
+ 7.4.126 mask 120
+ 7.4.127 max_display_recips 120
+ 7.4.128 max_line_length 120
+ 7.4.129 mbox 120
+ 7.4.130 mbox_type 121
+ 7.4.131 menu_context 121
+ 7.4.132 menu_move_off 121
+ 7.4.133 menu_scroll 121
+ 7.4.134 message_format 121
+ 7.4.135 meta_key 122
+ 7.4.136 metoo 122
+ 7.4.137 mh_purge 122
+ 7.4.138 mh_seq_flagged 122
+ 7.4.139 mh_seq_replied 122
+ 7.4.140 mh_seq_unseen 122
+ 7.4.141 mime_forward 123
+ 7.4.142 mime_forward_decode 123
+ 7.4.143 mime_forward_rest 123
+ 7.4.144 mix_entry_format 123
+ 7.4.145 mixmaster 124
+ 7.4.146 move 124
+ 7.4.147 msgid_format 124
+ 7.4.148 narrow_tree 125
+ 7.4.149 nntp_ask_followup_to 125
+ 7.4.150 nntp_ask_x_comment_to 125
+ 7.4.151 nntp_cache_dir 126
+ 7.4.152 nntp_catchup 126
+ 7.4.153 nntp_context 126
+ 7.4.154 nntp_followup_to_poster 126
+ 7.4.155 nntp_group_index_format 127
+ 7.4.156 nntp_host 127
+ 7.4.157 nntp_inews 127
+ 7.4.158 nntp_load_description 128
+ 7.4.159 nntp_mail_check 128
+
+ vi
+
+ 7.4.160 nntp_mime_subject 128
+ 7.4.161 nntp_newsrc 128
+ 7.4.162 nntp_pass 129
+ 7.4.163 nntp_post_moderated 129
+ 7.4.164 nntp_reconnect 129
+ 7.4.165 nntp_save_unsubscribed 130
+ 7.4.166 nntp_show_new_news 130
+ 7.4.167 nntp_show_only_unread 130
+ 7.4.168 nntp_user 130
+ 7.4.169 nntp_x_comment_to 130
+ 7.4.170 operating_system 131
+ 7.4.171 pager 131
+ 7.4.172 pager_context 131
+ 7.4.173 pager_format 131
+ 7.4.174 pager_index_lines 131
+ 7.4.175 pager_stop 132
+ 7.4.176 pgp_auto_decode 132
+ 7.4.177 pgp_autoinline 132
+ 7.4.178 pgp_check_exit 133
+ 7.4.179 pgp_clearsign_command 133
+ 7.4.180 pgp_decode_command 133
+ 7.4.181 pgp_decrypt_command 133
+ 7.4.182 pgp_encrypt_only_command 134
+ 7.4.183 pgp_encrypt_sign_command 134
+ 7.4.184 pgp_entry_format 134
+ 7.4.185 pgp_export_command 135
+ 7.4.186 pgp_getkeys_command 135
+ 7.4.187 pgp_good_sign 135
+ 7.4.188 pgp_ignore_subkeys 135
+ 7.4.189 pgp_import_command 135
+ 7.4.190 pgp_list_pubring_command 136
+ 7.4.191 pgp_list_secring_command 136
+ 7.4.192 pgp_long_ids 136
+ 7.4.193 pgp_mime_auto 136
+ 7.4.194 pgp_replyinline 136
+ 7.4.195 pgp_retainable_sigs 137
+ 7.4.196 pgp_show_unusable 137
+ 7.4.197 pgp_sign_as 137
+ 7.4.198 pgp_sign_command 137
+ 7.4.199 pgp_sort_keys 138
+ 7.4.200 pgp_strict_enc 138
+ 7.4.201 pgp_timeout 138
+ 7.4.202 pgp_use_gpg_agent 138
+ 7.4.203 pgp_verify_command 139
+ 7.4.204 pgp_verify_key_command 139
+ 7.4.205 pipe_decode 139
+ 7.4.206 pipe_sep 139
+ 7.4.207 pipe_split 139
+ 7.4.208 pop_auth_try_all 139
+ 7.4.209 pop_authenticators 140
+ 7.4.210 pop_delete 140
+ 7.4.211 pop_host 140
+ 7.4.212 pop_last 141
+
+ vii
+
+ 7.4.213 pop_mail_check 141
+ 7.4.214 pop_pass 141
+ 7.4.215 pop_reconnect 141
+ 7.4.216 pop_user 141
+ 7.4.217 post_indent_string 142
+ 7.4.218 postpone 142
+ 7.4.219 postponed 142
+ 7.4.220 preconnect 142
+ 7.4.221 print 143
+ 7.4.222 print_command 143
+ 7.4.223 print_decode 143
+ 7.4.224 print_split 143
+ 7.4.225 prompt_after 143
+ 7.4.226 query_command 144
+ 7.4.227 quit 144
+ 7.4.228 quote_empty 144
+ 7.4.229 quote_quoted 144
+ 7.4.230 quote_regexp 144
+ 7.4.231 read_inc 145
+ 7.4.232 read_only 145
+ 7.4.233 realname 145
+ 7.4.234 recall 145
+ 7.4.235 record 145
+ 7.4.236 reply_regexp 146
+ 7.4.237 reply_self 146
+ 7.4.238 reply_to 146
+ 7.4.239 resolve 146
+ 7.4.240 reverse_alias 147
+ 7.4.241 reverse_name 147
+ 7.4.242 reverse_realname 147
+ 7.4.243 rfc2047_parameters 147
+ 7.4.244 save_address 148
+ 7.4.245 save_empty 148
+ 7.4.246 save_name 148
+ 7.4.247 score 149
+ 7.4.248 score_threshold_delete 149
+ 7.4.249 score_threshold_flag 149
+ 7.4.250 score_threshold_read 149
+ 7.4.251 send_charset 149
+ 7.4.252 sendmail 150
+ 7.4.253 sendmail_wait 150
+ 7.4.254 shell 150
+ 7.4.255 sidebar_boundary 150
+ 7.4.256 sidebar_delim 151
+ 7.4.257 sidebar_newmail_only 151
+ 7.4.258 sidebar_number_format 151
+ 7.4.259 sidebar_shorten_hierarchy 152
+ 7.4.260 sidebar_visible 152
+ 7.4.261 sidebar_width 152
+ 7.4.262 sig_dashes 152
+ 7.4.263 sig_on_top 152
+ 7.4.264 signature 153
+ 7.4.265 signoff_string 153
+
+ viii
+
+ 7.4.266 simple_search 153
+ 7.4.267 sleep_time 153
+ 7.4.268 smart_wrap 154
+ 7.4.269 smileys 154
+ 7.4.270 smime_ask_cert_label 154
+ 7.4.271 smime_ca_location 154
+ 7.4.272 smime_certificates 154
+ 7.4.273 smime_decrypt_command 155
+ 7.4.274 smime_decrypt_use_default_key 155
+ 7.4.275 smime_default_key 155
+ 7.4.276 smime_encrypt_command 156
+ 7.4.277 smime_encrypt_with 156
+ 7.4.278 smime_get_cert_command 156
+ 7.4.279 smime_get_cert_email_command 156
+ 7.4.280 smime_get_signer_cert_command 156
+ 7.4.281 smime_import_cert_command 157
+ 7.4.282 smime_is_default 157
+ 7.4.283 smime_keys 157
+ 7.4.284 smime_pk7out_command 157
+ 7.4.285 smime_sign_command 157
+ 7.4.286 smime_sign_opaque_command 158
+ 7.4.287 smime_timeout 158
+ 7.4.288 smime_verify_command 158
+ 7.4.289 smime_verify_opaque_command 158
+ 7.4.290 smtp_envelope 158
+ 7.4.291 smtp_host 158
+ 7.4.292 smtp_pass 159
+ 7.4.293 smtp_port 159
+ 7.4.294 smtp_use_tls 159
+ 7.4.295 smtp_user 160
+ 7.4.296 sort 160
+ 7.4.297 sort_alias 160
+ 7.4.298 sort_aux 160
+ 7.4.299 sort_browser 161
+ 7.4.300 sort_re 161
+ 7.4.301 spam_separator 162
+ 7.4.302 spoolfile 162
+ 7.4.303 ssl_ca_certificates_file 162
+ 7.4.304 ssl_client_cert 162
+ 7.4.305 ssl_force_tls 162
+ 7.4.306 ssl_min_dh_prime_bits 163
+ 7.4.307 ssl_starttls 163
+ 7.4.308 ssl_use_sslv2 163
+ 7.4.309 ssl_use_sslv3 163
+ 7.4.310 ssl_use_tlsv1 163
+ 7.4.311 ssl_usesystemcerts 164
+ 7.4.312 status_chars 164
+ 7.4.313 status_format 164
+ 7.4.314 status_on_top 166
+ 7.4.315 strict_mailto 167
+ 7.4.316 strict_mime 167
+ 7.4.317 strict_threads 167
+ 7.4.318 strip_was 167
+
+ ix
+
+ 7.4.319 strip_was_regex 168
+ 7.4.320 stuff_quoted 168
+ 7.4.321 suspend 168
+ 7.4.322 text_flowed 168
+ 7.4.323 thorough_search 168
+ 7.4.324 thread_received 169
+ 7.4.325 tilde 169
+ 7.4.326 timeout 169
+ 7.4.327 tmpdir 169
+ 7.4.328 to_chars 169
+ 7.4.329 trash 170
+ 7.4.330 tunnel 170
+ 7.4.331 umask 170
+ 7.4.332 uncollapse_jump 170
+ 7.4.333 use_8bitmime 170
+ 7.4.334 use_domain 171
+ 7.4.335 use_from 171
+ 7.4.336 use_idn 171
+ 7.4.337 use_ipv6 171
+ 7.4.338 visual 171
+ 7.4.339 wait_key 172
+ 7.4.340 weed 172
+ 7.4.341 wrap_search 172
+ 7.4.342 wrapmargin 172
+ 7.4.343 write_bcc 172
+ 7.4.344 write_inc 173
+ 7.4.345 xterm_icon 173
+ 7.4.346 xterm_leave 173
+ 7.4.347 xterm_set_titles 173
+ 7.4.348 xterm_title 173
+ 7.5 Functions ....................................................... 174
+ 7.5.1 generic 174
+ 7.5.2 index 175
+ 7.5.3 pager 177
+ 7.5.4 alias 179
+ 7.5.5 query 179
+ 7.5.6 attach 179
+ 7.5.7 compose 180
+ 7.5.8 postpone 181
+ 7.5.9 browser 181
+ 7.5.10 pgp 182
+ 7.5.11 editor 182
+
+ 8. Miscellany ............................................................ 182
+ 8.1 Acknowledgments ................................................. 183
+ 8.2 About this document ............................................. 185
+
+ x
+