+ 4.14.1 The Folder Browser 61
+ 4.14.2 Authentication 62
+ 4.15 NNTP Support (OPTIONAL) ........................................ 62
+ 4.15.1 Again: Scoring 63
+ 4.16 SMTP Support (OPTIONAL) ........................................ 63
+ 4.17 Managing multiple IMAP/POP/NNTP accounts (OPTIONAL) ............ 64
+ 4.18 Start a WWW Browser on URLs (EXTERNAL) ......................... 64
+ 4.19 Compressed folders Support (OPTIONAL) .......................... 65
+ 4.19.1 Open a compressed mailbox for reading 65
+ 4.19.2 Write a compressed mailbox 66
+ 4.19.3 Append a message to a compressed mailbox 66
+ 4.19.4 Encrypted folders 67
+
+ 5. Mutt-ng's MIME Support ............................................... 67
+ 5.1 Using MIME in Mutt ............................................. 67
+ 5.1.1 Viewing MIME messages in the pager 68
+ 5.1.2 The Attachment Menu 68
+ 5.1.3 The Compose Menu 68
+ 5.2 MIME Type configuration with mime.types ........................ 69
+ 5.3 MIME Viewer configuration with mailcap ......................... 69
+ 5.3.1 The Basics of the mailcap file 70
+ 5.3.2 Secure use of mailcap 71
+ 5.3.3 Advanced mailcap Usage 72
+ 5.3.4 Example mailcap files 74
+ 5.4 MIME Autoview .................................................. 75
+ 5.5 MIME Multipart/Alternative ..................................... 76
+ 5.6 MIME Lookup .................................................... 76
+
+ 6. Security Considerations ............................................ 77
+ 6.1 Passwords .................................................. 77
+ 6.2 Temporary Files ............................................ 77
+ 6.3 Information Leaks ............................................ 78
+ 6.3.1 Message-ID: headers 78
+ 6.3.2 mailto:-style links 78
+ 6.4 External applications ...................................... 78
+ 6.4.1 mailcap 78
+ 6.4.2 Other 79
+
+ 7. Reference ............................................................ 79
+ 7.1 Command line options ........................................... 79
+ 7.2 Patterns ....................................................... 80
+ 7.3 Configuration Commands ......................................... 82
+ 7.4 Configuration variables .......................................... 84
+ 7.4.1 abort_nosubject 85
+ 7.4.2 abort_unmodified 86
+ 7.4.3 alias_file 86
+ 7.4.4 alias_format 86
+ 7.4.5 allow_8bit 86
+ 7.4.6 allow_ansi 87
+ 7.4.7 arrow_cursor 87
+ 7.4.8 ascii_chars 87
+ 7.4.9 askbcc 87
+ 7.4.10 askcc 87
+
+ iii
+
+ 7.4.11 assumed_charset 88
+ 7.4.12 attach_format 88
+ 7.4.13 attach_sep 89
+ 7.4.14 attach_split 89
+ 7.4.15 attribution 89
+ 7.4.16 auto_tag 89
+ 7.4.17 autoedit 90
+ 7.4.18 beep 90
+ 7.4.19 beep_new 90
+ 7.4.20 bounce 90
+ 7.4.21 bounce_delivered 90
+ 7.4.22 braille_friendly 91
+ 7.4.23 certificate_file 91
+ 7.4.24 charset 91
+ 7.4.25 check_new 91
+ 7.4.26 collapse_unread 92
+ 7.4.27 compose_format 92
+ 7.4.28 config_charset 92
+ 7.4.29 confirmappend 92
+ 7.4.30 confirmcreate 93
+ 7.4.31 connect_timeout 93
+ 7.4.32 content_type 93
+ 7.4.33 copy 93
+ 7.4.34 crypt_autoencrypt 93
+ 7.4.35 crypt_autopgp 94
+ 7.4.36 crypt_autosign 94
+ 7.4.37 crypt_autosmime 94
+ 7.4.38 crypt_replyencrypt 94
+ 7.4.39 crypt_replysign 94
+ 7.4.40 crypt_replysignencrypted 95
+ 7.4.41 crypt_timestamp 95
+ 7.4.42 crypt_use_gpgme 95
+ 7.4.43 crypt_verify_sig 95
+ 7.4.44 date_format 95
+ 7.4.45 default_hook 96
+ 7.4.46 delete 96
+ 7.4.47 delete_untag 96
+ 7.4.48 digest_collapse 96
+ 7.4.49 display_filter 97
+ 7.4.50 dotlock_program 97
+ 7.4.51 dsn_notify 97
+ 7.4.52 dsn_return 97
+ 7.4.53 duplicate_threads 98
+ 7.4.54 edit_headers 98
+ 7.4.55 editor 98
+ 7.4.56 encode_from 98
+ 7.4.57 entropy_file 98
+ 7.4.58 envelope_from 99
+ 7.4.59 escape 99
+ 7.4.60 fast_reply 99
+ 7.4.61 fcc_attach 99
+ 7.4.62 fcc_clear 99
+ 7.4.63 file_charset 99
+
+ iv
+
+ 7.4.64 folder 100
+ 7.4.65 folder_format 100
+ 7.4.66 followup_to 101
+ 7.4.67 force_buffy_check 101
+ 7.4.68 force_name 101
+ 7.4.69 forward_decode 102
+ 7.4.70 forward_decrypt 102
+ 7.4.71 forward_edit 102
+ 7.4.72 forward_format 102
+ 7.4.73 forward_quote 102
+ 7.4.74 from 103
+ 7.4.75 gecos_mask 103
+ 7.4.76 hdrs 103
+ 7.4.77 header 103
+ 7.4.78 header_cache 104
+ 7.4.79 header_cache_compress 104
+ 7.4.80 help 104
+ 7.4.81 hidden_host 104
+ 7.4.82 hide_limited 105
+ 7.4.83 hide_missing 105
+ 7.4.84 hide_thread_subject 105
+ 7.4.85 hide_top_limited 105
+ 7.4.86 hide_top_missing 105
+ 7.4.87 history 105
+ 7.4.88 honor_followup_to 106
+ 7.4.89 hostname 106
+ 7.4.90 ignore_list_reply_to 106
+ 7.4.91 imap_authenticators 106
+ 7.4.92 imap_check_subscribed 107
+ 7.4.93 imap_delim_chars 107
+ 7.4.94 imap_headers 107
+ 7.4.95 imap_home_namespace 107
+ 7.4.96 imap_keepalive 108
+ 7.4.97 imap_list_subscribed 108
+ 7.4.98 imap_login 108
+ 7.4.99 imap_mail_check 108
+ 7.4.100 imap_pass 109
+ 7.4.101 imap_passive 109
+ 7.4.102 imap_peek 109
+ 7.4.103 imap_reconnect 109
+ 7.4.104 imap_servernoise 110
+ 7.4.105 imap_user 110
+ 7.4.106 implicit_autoview 110
+ 7.4.107 include 110
+ 7.4.108 include_onlyfirst 110
+ 7.4.109 indent_string 111
+ 7.4.110 index_format 111
+ 7.4.111 ispell 113
+ 7.4.112 keep_flagged 114
+ 7.4.113 list_reply 114
+ 7.4.114 locale 114
+ 7.4.115 mail_check 114
+ 7.4.116 mailcap_path 114
+
+ v
+
+ 7.4.117 mailcap_sanitize 115
+ 7.4.118 maildir_header_cache_verify 115
+ 7.4.119 maildir_trash 115
+ 7.4.120 mark_old 115
+ 7.4.121 markers 116
+ 7.4.122 mask 116
+ 7.4.123 max_display_recips 116
+ 7.4.124 max_line_length 116
+ 7.4.125 mbox 116
+ 7.4.126 mbox_type 116
+ 7.4.127 menu_context 117
+ 7.4.128 menu_move_off 117
+ 7.4.129 menu_scroll 117
+ 7.4.130 message_format 117
+ 7.4.131 meta_key 117
+ 7.4.132 metoo 118
+ 7.4.133 mh_purge 118
+ 7.4.134 mh_seq_flagged 118
+ 7.4.135 mh_seq_replied 118
+ 7.4.136 mh_seq_unseen 118
+ 7.4.137 mime_forward 118
+ 7.4.138 mime_forward_decode 119
+ 7.4.139 mime_forward_rest 119
+ 7.4.140 mix_entry_format 119
+ 7.4.141 mixmaster 120
+ 7.4.142 move 120
+ 7.4.143 msgid_format 120
+ 7.4.144 narrow_tree 121
+ 7.4.145 nntp_ask_followup_to 121
+ 7.4.146 nntp_ask_x_comment_to 121
+ 7.4.147 nntp_cache_dir 122
+ 7.4.148 nntp_catchup 122
+ 7.4.149 nntp_context 122
+ 7.4.150 nntp_followup_to_poster 122
+ 7.4.151 nntp_group_index_format 123
+ 7.4.152 nntp_host 123
+ 7.4.153 nntp_inews 123
+ 7.4.154 nntp_load_description 124
+ 7.4.155 nntp_mail_check 124
+ 7.4.156 nntp_mime_subject 124
+ 7.4.157 nntp_newsrc 124
+ 7.4.158 nntp_pass 125
+ 7.4.159 nntp_post_moderated 125
+ 7.4.160 nntp_reconnect 125
+ 7.4.161 nntp_save_unsubscribed 125
+ 7.4.162 nntp_show_new_news 126
+ 7.4.163 nntp_show_only_unread 126
+ 7.4.164 nntp_user 126
+ 7.4.165 nntp_x_comment_to 126
+ 7.4.166 operating_system 126
+ 7.4.167 pager 127
+ 7.4.168 pager_context 127
+ 7.4.169 pager_format 127
+
+ vi
+
+ 7.4.170 pager_index_lines 127
+ 7.4.171 pager_stop 128
+ 7.4.172 pgp_auto_decode 128
+ 7.4.173 pgp_autoinline 128
+ 7.4.174 pgp_check_exit 128
+ 7.4.175 pgp_clearsign_command 129
+ 7.4.176 pgp_decode_command 129
+ 7.4.177 pgp_decrypt_command 129
+ 7.4.178 pgp_encrypt_only_command 130
+ 7.4.179 pgp_encrypt_sign_command 130
+ 7.4.180 pgp_entry_format 130
+ 7.4.181 pgp_export_command 131
+ 7.4.182 pgp_getkeys_command 131
+ 7.4.183 pgp_good_sign 131
+ 7.4.184 pgp_ignore_subkeys 131
+ 7.4.185 pgp_import_command 131
+ 7.4.186 pgp_list_pubring_command 131
+ 7.4.187 pgp_list_secring_command 132
+ 7.4.188 pgp_long_ids 132
+ 7.4.189 pgp_mime_auto 132
+ 7.4.190 pgp_replyinline 132
+ 7.4.191 pgp_retainable_sigs 133
+ 7.4.192 pgp_show_unusable 133
+ 7.4.193 pgp_sign_as 133
+ 7.4.194 pgp_sign_command 133
+ 7.4.195 pgp_sort_keys 133
+ 7.4.196 pgp_strict_enc 134
+ 7.4.197 pgp_timeout 134
+ 7.4.198 pgp_use_gpg_agent 134
+ 7.4.199 pgp_verify_command 134
+ 7.4.200 pgp_verify_key_command 135
+ 7.4.201 pipe_decode 135
+ 7.4.202 pipe_sep 135
+ 7.4.203 pipe_split 135
+ 7.4.204 pop_auth_try_all 135
+ 7.4.205 pop_authenticators 136
+ 7.4.206 pop_delete 136
+ 7.4.207 pop_host 136
+ 7.4.208 pop_last 136
+ 7.4.209 pop_mail_check 137
+ 7.4.210 pop_pass 137
+ 7.4.211 pop_reconnect 137
+ 7.4.212 pop_user 137
+ 7.4.213 post_indent_string 137
+ 7.4.214 postpone 138
+ 7.4.215 postponed 138
+ 7.4.216 preconnect 138
+ 7.4.217 print 138
+ 7.4.218 print_command 139
+ 7.4.219 print_decode 139
+ 7.4.220 print_split 139
+ 7.4.221 prompt_after 139
+ 7.4.222 query_command 139
+
+ vii
+
+ 7.4.223 quit 140
+ 7.4.224 quote_empty 140
+ 7.4.225 quote_quoted 140
+ 7.4.226 quote_regexp 140
+ 7.4.227 read_inc 140
+ 7.4.228 read_only 141
+ 7.4.229 realname 141
+ 7.4.230 recall 141
+ 7.4.231 record 141
+ 7.4.232 reply_regexp 142
+ 7.4.233 reply_self 142
+ 7.4.234 reply_to 142
+ 7.4.235 resolve 142
+ 7.4.236 reverse_alias 142
+ 7.4.237 reverse_name 143
+ 7.4.238 reverse_realname 143
+ 7.4.239 rfc2047_parameters 143
+ 7.4.240 save_address 144
+ 7.4.241 save_empty 144
+ 7.4.242 save_name 144
+ 7.4.243 score 144
+ 7.4.244 score_threshold_delete 145
+ 7.4.245 score_threshold_flag 145
+ 7.4.246 score_threshold_read 145
+ 7.4.247 send_charset 145
+ 7.4.248 sendmail 145
+ 7.4.249 sendmail_wait 146
+ 7.4.250 shell 146
+ 7.4.251 sidebar_boundary 146
+ 7.4.252 sidebar_delim 146
+ 7.4.253 sidebar_newmail_only 147
+ 7.4.254 sidebar_number_format 147
+ 7.4.255 sidebar_shorten_hierarchy 147
+ 7.4.256 sidebar_visible 148
+ 7.4.257 sidebar_width 148
+ 7.4.258 sig_dashes 148
+ 7.4.259 sig_on_top 148
+ 7.4.260 signature 148
+ 7.4.261 signoff_string 149
+ 7.4.262 simple_search 149
+ 7.4.263 sleep_time 149
+ 7.4.264 smart_wrap 149
+ 7.4.265 smileys 150
+ 7.4.266 smime_ask_cert_label 150
+ 7.4.267 smime_ca_location 150
+ 7.4.268 smime_certificates 150
+ 7.4.269 smime_decrypt_command 150
+ 7.4.270 smime_decrypt_use_default_key 151
+ 7.4.271 smime_default_key 151
+ 7.4.272 smime_encrypt_command 151
+ 7.4.273 smime_encrypt_with 152
+ 7.4.274 smime_get_cert_command 152
+ 7.4.275 smime_get_cert_email_command 152
+
+ viii
+
+ 7.4.276 smime_get_signer_cert_command 152
+ 7.4.277 smime_import_cert_command 152
+ 7.4.278 smime_is_default 152
+ 7.4.279 smime_keys 153
+ 7.4.280 smime_pk7out_command 153
+ 7.4.281 smime_sign_command 153
+ 7.4.282 smime_sign_opaque_command 153
+ 7.4.283 smime_timeout 154
+ 7.4.284 smime_verify_command 154
+ 7.4.285 smime_verify_opaque_command 154
+ 7.4.286 smtp_envelope 154
+ 7.4.287 smtp_host 154
+ 7.4.288 smtp_pass 155
+ 7.4.289 smtp_port 155
+ 7.4.290 smtp_use_tls 155
+ 7.4.291 smtp_user 155
+ 7.4.292 sort 156
+ 7.4.293 sort_alias 156
+ 7.4.294 sort_aux 156
+ 7.4.295 sort_browser 157
+ 7.4.296 sort_re 157
+ 7.4.297 spam_separator 157
+ 7.4.298 spoolfile 158
+ 7.4.299 ssl_ca_certificates_file 158
+ 7.4.300 ssl_client_cert 158
+ 7.4.301 ssl_force_tls 158
+ 7.4.302 ssl_min_dh_prime_bits 158
+ 7.4.303 ssl_starttls 159
+ 7.4.304 ssl_use_sslv2 159
+ 7.4.305 ssl_use_sslv3 159
+ 7.4.306 ssl_use_tlsv1 159
+ 7.4.307 ssl_usesystemcerts 159
+ 7.4.308 status_chars 160
+ 7.4.309 status_format 160
+ 7.4.310 status_on_top 162
+ 7.4.311 strict_mailto 162
+ 7.4.312 strict_mime 163
+ 7.4.313 strict_threads 163
+ 7.4.314 strip_was 163
+ 7.4.315 strip_was_regex 163
+ 7.4.316 stuff_quoted 164
+ 7.4.317 suspend 164
+ 7.4.318 text_flowed 164
+ 7.4.319 thorough_search 164
+ 7.4.320 thread_received 164
+ 7.4.321 tilde 165
+ 7.4.322 timeout 165
+ 7.4.323 tmpdir 165
+ 7.4.324 to_chars 165
+ 7.4.325 trash 165
+ 7.4.326 tunnel 166
+ 7.4.327 umask 166
+ 7.4.328 uncollapse_jump 166
+
+ ix
+
+ 7.4.329 use_8bitmime 166
+ 7.4.330 use_domain 166
+ 7.4.331 use_from 167
+ 7.4.332 use_idn 167
+ 7.4.333 use_ipv6 167
+ 7.4.334 user_agent 167
+ 7.4.335 visual 167
+ 7.4.336 wait_key 168
+ 7.4.337 weed 168
+ 7.4.338 wrap_search 168
+ 7.4.339 wrapmargin 168
+ 7.4.340 write_bcc 168
+ 7.4.341 write_inc 169
+ 7.4.342 xterm_icon 169
+ 7.4.343 xterm_leave 169
+ 7.4.344 xterm_set_titles 169
+ 7.4.345 xterm_title 169
+ 7.5 Functions ....................................................... 170
+ 7.5.1 generic 170
+ 7.5.2 index 171
+ 7.5.3 pager 173
+ 7.5.4 alias 175
+ 7.5.5 query 175
+ 7.5.6 attach 175
+ 7.5.7 compose 176
+ 7.5.8 postpone 177
+ 7.5.9 browser 177
+ 7.5.10 pgp 178
+ 7.5.11 editor 178
+
+ 8. Miscellany ............................................................ 178
+ 8.1 Acknowledgments ................................................. 179
+ 8.2 About this document ............................................. 181
+
+ x
+