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Manual Reference Pages  -  PRAYER.CF (5)

NAME - main Prayer configuration file


     Mail server settings
     Mail domain configuration
     HTTP and other frontend settings
     Session specific configuration
     Display specific configuration
     Paths etc.
     Defaults for user preferences
     Hidden preferences
See Also

DESCRIPTION is the configuration file of prayer(8) and prayer-session(8).


For the most part, consists of option = value pairs, but some configuration items are more complex. All values may be enclosed in double quotes, which are stripped. Quotes must be used if a value contains a #’ character. Otherwise, everything following it is treated as a comment. Any line can be folded using a \(rs’ character at the end of the line; any linear white space at the beginning of the next line is removed.

Simple options can be of the following types:
Vt string No particular restrictions.
Vt path A file or directory name. The configuration parser expands occurences of a few macros in settings of this type. See
.Cd prefix and Cd var_prefix below.
Vt boolean The following forms are interpreted as true: true’, t’, and 1’. The following forms are interpreted as false: false’, nil’, 0’. Capitalisation does not matter.
Vt number An integer number (sequence of digits 0-9), optionally immediately followed by a single letter K’, causing the number to be multiplied by 1024, or M’ multiplying it by 1024 \(pc 1024.
Vt time An integer number (sequence of digits 0-9) of seconds, optionally immediately followed by a single case-insignificant letter s’, which has no effect, m’, causing the number to be multiplied by 60, h’, multiplying it by 60 \(pc 60, or d’, for a multiple of 24 \(pc 60 \(pc 60.
Vt perm A file permission mode; an octal number of exactly four digits, where the first digit must be 0.


Cd prefix Vt( string), Cd var_prefix Vt( string)
  The values of these options can be referred to as $prefix (or ${prefix}), and $var_prefix (or ${var_prefix}), respectively, in settings of type
.Vt path in the rest of the file.

Default: none. Need to be set only if referenced later.

Cd prayer_user Vt( string), Cd prayer_uid Vt( number)
  User name or ID to setuid(2) to if started as root. Either, but not both, must be set and must not specify uid 0. Default: none.
Cd prayer_group Vt( string), Cd prayer_gid Vt( number)
  Group name or ID to setgid(2) to if we start off as root. In addition, prayer calls initgroups(3) if
.Cd prayer_user is set. Default: none.
Cd prayer_background Vt( boolean)
  Run prayer as background process. If true, prayer will return as soon as valid configuration is found. Default: true
Cd file_perms Vt( perm)
  Create mode for new files. Default: 0640 if Cd prayer_uid or Cd prayer_user is set, otherwise 0644.
Cd directory_perms Vt( perm)
  Create mode for new directories. Default: 0750 if Cd prayer_uid or Cd prayer_user is set, otherwise 0755.
Cd check_directory_perms Vt( boolean)
  Check existing directories under ${var_prefix} ?

    Mail server settings

Cd imapd_server Vt( string)
  Specifies the default IMAP server(s) using libc-client syntax:

.Sm Ar host Oo : Ar port Oc Op / Ar flag Oo / Ar flag Oc Ar ...
.Sm on

Multiple server specifications can be listed, separated by commas. Common flags are:

/ssl Use SSL-on-connect (on port 993 by default).
/tls Force use of TLS (using STARTTLS on the normal IMAP port) to encrypt the session. Recommended if the server is remote, since otherwise a downgrade attack is possible.
/notls Don’t issue STARTTLS even if the server supports it. Recommended if the server is localhost.
/novalidate-cert Don’t check the integrity of the server certificate.
For the full list of flags, see naming.txt.gz in the current libc-client package.
Cd imapd_user_map Vt( path) CDB lookup map overriding default imapd_server location. For information on CDB, see
Cd prefs_folder_name Vt( string) Name of Prayer user preferences folder on IMAP server.
Cd use_namespace( Vt boolean) Use IMAP NAMESPACE command to find
.Cd personal_hierarchy No and Cd hiersep . Default: true.
Cd personal_hierarchy( Vt string) If not supplied by NAMESPACE. Default: .
Cd hiersep( Vt string) If not supplied by NAMESPACE. Default: / .
Cd dualuse( Vt boolean) Hint to Prayer that new mailboxes are dual use (i.e. can contain both mail and inferior mailboxes). Things will mostly work if dualuse set to false on a server which supports it, but people will be unable to create children of newly created mailboxes without refreshing the view.

Default: false.

Cd sieved_server Vt( string) Talk to Cyrus timsieved using MANAGESIEVE protocol. Syntax is similar to
.Cd imapd_server , except the only recognised flag is /ssl.
Cd sieved_user_map Vt( path) Can be used to provide individualised imapd_server settings in the form of a CDB file.
Cd sieved_timeout Vt( time) Default timsieved timeout is 10 minutes

    Mail domain configuration

Cd local_domain
  Define a valid local domain, and optionally the valid local parts in that domain. This is a special directive that can appear multiple times and does not use an equals sign:

.Cd local_domain Ar domain Op Ar map

Without map, Cd local_domain simply defines a domain which will appear on the list visible to user preferences. With map, it also defines a list a CDB map file which defines valid entries in that domain; used for personal name expansion and checking for valid addresses: The keys are the valid local parts and the values are the corresponding full names of the users.

Default: A single entry which corresponds to
.Cd default_domain .

Cd return_path_domain Vt( string)
  Domain used in the return address given to sendmail(8). Default: the default domain.
Cd filter_domain_pattern Vt( string)
  A filter pattern which is equivalent to, or at least approximates the list of local domains. Default: the default domain.
Cd hostname Vt( string)
  Hostname is the canonical name for this particular system, used in session and icon URLs which are generated by Prayer. This is derived automatically using gethostname(2) and gethostbyname(3) if no value is provided. However, there are situations, especially involving SSL certificates, where the default hostname may not be appropriate. The special value __UNDEFINED__’ here means the startup script or command line must provide a hostname using a --config-option override or via the environment variable PRAYER_HOSTNAME. This is just a safeguard for systems which use DNS round robining to distribute load across a number of machines.
Cd hostname_service Vt( string)
  Host name common for all Prayer installations part of the same webmail service. (Only) useful for large installations using DNS round robin for load balancing (example: is an alias for webmail[123] This setting is used for two things: The user is redirected to this hostname after logging out, and HTTP requests are sanity checked against it in addition to the canonical hostname.

Default: none

Cd fix_from_address( Vt boolean)
  suppresses the From address option from the Preferences and Roles screens. Default: false.
Cd lookup_rpasswd( Vt path)
  Path to a CDB file that maps arbitrary search keys to colon- or comma-separated lists of user names. Note: Keys must be lowercase; Prayer converts search strings to lowercase in order to provide case-insensitive lookup.
Cd lookup_rusername( Vt path)
  Path to a second CDB file that maps arbitrary search keys to colon- or comma-separated lists of user names.

If the user enters a valid and existing username according to getpwnam 3, Prayer does not search these first two CDB files, but skips directly to the second stage of looking up user information.

Cd lookup_username( Vt path)
  Path to a CDB file that maps usernames to records consisting of the user’s "registered name" and his/her affiliation (department), separated by a vertical bar (|’). Additionally, if a second vertical bar follows, the account is regarded as cancelled.

When presenting the search results, the usernames found are combined with the
.Cd default_domain to form email addresses. It is not possible at this time to let users search for addresses in more than one domain using this facility.

Cd lookup_fullname( Vt path)
  Path to a CDB file that maps usernames to "display names", possibly provided by the users themselves in some way. The display name of a user is used together with the email address in recipient fields

Note that all four lookup options must be set to valid CDB files for the local lookup to work, but more than one option may conceivably point to the same file.

Cd ldap_server( Vt string)
  Name or address of LDAP server.
Cd ldap_base_dn( Vt string)
  Base DN to search. After binding anonymously, Prayer performs a one-level-scope search for entries with surname or mail attributes containing the search string. The following attributes are fetched and presented:
  • uid
  • displayName
  • cn"(registered name")
  • ou"(affiliation")
  • mail
  • telephoneNumber
Cd ldap_timeout( Vt time)
  Search timeout. Default: 30s.

    HTTP and other frontend settings

Cd use_http_port, use_https_port
  Define a single HTTP[S] port to bind to. You can define an arbitary list of ports of both kinds by using a series of separate
.Cd use_http_port No and Cd use_https_port directives, with one port on each line. Syntax:

.Cd use_http_port Oo Ar interface : Oc Ns Ar port
.Cd use_https_port Oo Ar interface : Oc Ns Ar port

interface can be an IP (v4 or v6) address or a hostname. If provided, it is passed to getaddrinfo(3) for resolution, and the first resulting address is used to bind to. Otherwise, prayer(8) binds to port on all interfaces.

Cd ssl_default_port Vt( number)
  Prayer will put a warning on the login page for HTTP connections if both HTTP and HTTPS sessions are available. This will provide a link to the SSL version of the service, defaulting to port 443 or failing that the first defined HTTPS port. ssl_default_port overrides the built in logic.

Should be rarely required now that Prayer automatically derives an appropriate port if none is provided here.

Cd ssl_cert_file Vt( path)
  Locatation of SSL certificate file (only used if SSL ports defined). Required if we are going to provide SSL services.
Cd ssl_privatekey_file Vt( path)
  Location of SSL private key file (only used if SSL ports defined). Required if we are going to provide SSL services.
Cd ssl_rsakey_lifespan Vt( time)
  Master server will regenerate shared RSA key at this interval. Default: 15m.
Cd ssl_rsakey_freshen Vt( time)
  RSA key remains fresh in child process for this long after first actual use. Default: 15m.
Cd ssl_session_timeout Vt( time)
  SSL session cache TTL. Default: 0 (SSL session cache not used). prayer-ssl-prune 8 should be run periodically to purge any stale session data from the DBD database.
Cd egd_socket Vt( path)
  Path to entropy gathering daemon socket. If provided, it will be used in place of or in addition to /dev/urandom
Cd contact_email Vt( string)
  System administrator email address. This setting is currently not used. If you want to display support information to your users, customise the templates.
Cd fatal_dump_core Vt( boolean)
  Dump core on fatal error. Default: false.
Cd log_debug Vt( boolean)
  Enable somewhat more verbose logging, mainly in relation to SSL. Default: false.
Cd fix_client_ipaddr Vt( boolean)
  Client must connect from consistent IP addresses. May be useful as a security measure in LAN environments. Painful for dialup users whose connections may drop out. Default: false.
Cd gzip_allow_nets Vt( string), Cd gzip_deny_nets Vt( string)
  prayer-session(8) gzip-compresses pages sent to clients if:
  1. gzip compression enabled at compile time,

  2. .Cd use_gzip No is set in user preferences,
  3. User agent is known to support Content-Encoding: gzip,
  4. User agent asks for Content-Encoding: gzip or x-gzip,
  5. IP address of client appears in
    .Cd gzip_allow_nets or IP address of client does not appear in Cd gzip_deny_nets.

The format of these options is a sequence of ipaddr [/ masklen] items, separated by colons and whitespace (to allow for IPv6 addresses to be parsed easily). If masklen is omitted, the item is interpreted as a full host address.

Cd log_name_nets Vt( string)
  A network list in the same format as
.Cd gzip_allow_nets above. To avoid delay when a user logs in, prayer-session(8) only performs a reverse lookup of the remote address if matches this list. Default: empty; no reverse lookup are performed.
Cd limit_vm Vt( number)
  Virtual memory limit imposed on each process to stop runaway process killing system. See setrlimit(2). Default: no limit.
Cd http_max_method_size Vt( number)
  Prayer should in theory be able to cope with input of arbitrary size. In practice however, the incoming request has to be stored somewhere and without limits an attacker may exhaust available memory, causing a denial of service attack.

This sets the maximum size of the initial line of an HTTP request. Default: no limit.

Cd http_max_hdr_size Vt( number)
  Maximum for headers associated with this request.
Cd http_max_body_size Vt( number)
  Maximum for HTTP payload. This is the most significant one in normal use.
Cd draft_att_single_max( Vt number)
  Maximum size of a single attachment when composing a mail. Default: 0 (unlimited).
Cd draft_att_total_max( Vt number)
  Maximum size of all attachments. Default: 0 (unlimited).
Cd http_min_servers Vt( number)
  Minimum number of preforked prayer 8 HTTP servers. The master process forks new slave processes whenever the number of idle slaves falls below this number, unless the total number of slaves would exceed
.Cd http_max_servers . Default: 4.
Cd http_max_servers Vt( number)
  Maximum number of preforked prayer 8 HTTP servers (active and idle). The master process does not, however, enforce any maximum number of idle slave processes; they have to terminate voluntarily by timing out or serving the maximum number of connections. Default: 64.
Cd http_max_connections Vt( number)
  Maximum number of connections that each frontend server will process. Default: 0 (no limit).
Cd http_timeout_idle Vt( time)
  Timeout for (dirty) spare server waiting for another HTTP connection. Default: 30s.
Cd http_timeout_icons Vt( time)
  Timeout for HTTP connection that last served static content. Default: 10s.
Cd http_timeout_session Vt( time)
  Timeout for HTTP connection that last served a session URL or has not served anything yet. Default: 60s.
Cd http_cookie_use_port Vt( boolean)
  Present HTTP cookies to browser as "username:port=value" rather than "username=value". Allows simultaneous login sessions from a single client browser. However can leave a trail of cookies behind. Probably don’t want this in the long term, it’s here for experimentation purposes only at the moment.
Cd icon_expire_timeout Vt( time)
  The amount of time in the future to set the HTTP Expires: field for static content. Default: 7d. (In contrast sessions URLs expire immediately: Browsers really shouldn’t be trying to cache this stuff, especially when it is coming in over HTTPS).

    Session specific configuration

Cd session_idle_time Vt( time)
  Session switches to idle mode after this much time: connections to IMAP and accountd servers are shut down. Default: 0 (idle mode disabled).
Cd session_timeout Vt( time)
  Session terminates after this much idle time. 0’ means session never times out. Default: 4h.
Cd session_timeout_compose Vt( time)
  Session terminates after this much idle time instead when the last command was compose or‘sieve’. It should probably not be set lower than
.Cd session_timeout . Default: 0 (always use the same timeout).
Cd stream_ping_interval Vt( time)
  Ping INBOX, Other, and Draft streams at this interval. Default: 5m.
Cd stream_checkpoint Vt( boolean)
  Use CHECKPOINT instead of PING to \(lqping\(rq streams. Default: true.
Cd stream_misc_timeout Vt( time)
  Shut down Postponed, Preferences and Transfer streams entirely after this much idle time, but only if idle mode doesn’t beat us to it. Default: 0 (disabled).
Cd log_ping_interval Vt( time)
  stat 2 log files at this interval to see if target file has been renamed or removed. 0s’ means stat() log file every time something is logged. Default: 5m.
Cd db_ping_interval Vt( time)
  Interval at which to re-read CDB files containing the local domain. Default: 30m.
Cd recips_max_msg Vt( number)
  Maximum number of recipients per message. Default: 0 (unlimited).
Cd recips_max_session Vt( number)
  Maximum number of recipients per session. Automatically creates file in
.Cd sending_block_dir if limit reached and that is defined. Default: 0 (unlimited).
Cd sending_allow_dir Vt( path)
  Create empty file named user in this directory to disable
.Cd recips_max_session for that user.
Cd sending_block_dir Vt( path)
  Create empty file named user in this directory to disable outgoing email for that user (automatic defense against phishing attacks).

    Display specific configuration

Cd login_banner Vt( string)
  Used in the <title> and heading of the login page Default: Webmail Service Login .
Cd login_service_name Vt( string)
  Used in the <title> and elsewhere to refer to the webmail system after the user has logged in. Default: Prayer .
Cd login_template Vt( string)
  Template to use on the login screen.
Cd login_insert1_path Vt( path)
  Optional file to include in login page template (as $login_insert1).
Cd login_insert2_path Vt( path)
  Optional file to include in login page template (as $login_insert2).
Cd motd_path Vt( path)
  File to use as the part of the login page immediately following the login form.
Cd ssl_encouraged( Vt boolean)
  If the user connects over unencrypted HTTP, do not show the login form on the start ( /) page. A link to /login, where the form is still displayed, is still provided. Default: false. Ignored if Cd ssl_redirect or Cd ssl_required is true.
Cd ssl_redirect( Vt boolean)
  If the user connects over unencrypted HTTP, return a 302’ redirect to the default SSL port. Only the start ( /) page is redirected and it may be possible to switch between http and https after loggin in, subject to cookie rules.

Default: false.

Cd ssl_required( Vt boolean)
  Return a 403 Forbidden’ error if the user tries to access anything over unencrypted HTTP.
.Cd ssl_redirect No still has effect, however.
Cd list_addr_maxlen Vt( number)
  The maximum number of characters to show from addresses on the mailbox list screen. Default: 30.
Cd list_subject_maxlen Vt( number)
  The maximum number of characters to show from the subject on the mailbox list screen. Default: 30.
Cd change_max_folders( Vt number)
  The maximum number of folders allowed in the quick folder change dropdown list. If there would be too many folders, the quick list is disabled altogether. Only folders that are expanded in the folder view are included.

Default: 20.

Cd template_path( Vt path)
  Path to uncompiled template sets (directories). Default: ../templates (relative to
.Cd tmp_dir ) .
Cd template_set( Vt string)
  Template set to use. Default: xhtml_strict .
Cd template_use_compiled( Vt boolean)
  Use the compiled-in templates, ignoring
.Cd template_path . Default: true.
Cd theme
  Define themes and their colors. Semi-deprecated; Colours set with this directive are only used by the xhtml_transitional template set. The xhtml_strict template set, as well as the login screen, use CSS instead. It is still necessary to tell Prayer which themes are available, however.


.Cd theme Ar name Li description Ar description
.Cd theme Ar name element colour
.Cd theme Ar name element colour ...

description is the label shown in the theme dropdown lists on the General Preferences page.

element is one of fgcolor, fgcolor_link, bgcolor, bgcolor_banner, bgcolor_row1, bgcolor_row2, bgcolor_status, bgcolor_status_none, fgcolor_quote1, fgcolor_quote2, fgcolor_quote3, and fgcolor_quote4. The first three are not used by any standard template set, but are available. Please study the templates to understand how the rest are used.

colour is any valid HTML Vt %Color value. Remember that strings containing hash marks need to be quoted.

Cd theme_default_main( Vt string)
  The name of the default theme.
Cd theme_default_main( Vt string)
  The name of the default theme in help mode.
Cd use_ispell_language
  Ispell languages that we want to support, with some descriptive text for the preferences screen. Syntax:

.Cd use_ispell_language Ar wordlist Ar description


use_ispell_language british"British English"

    Paths etc.

Cd aspell_path( Vt path)
  Location of Aspell Binary (takes precedence over
.Cd ispell_path ) .
Cd bin_dir( Vt path)
  Location of Prayer binaries ( prayer 8 and prayer-session(8)). Default: none. Must be set.
Cd icon_dir( Vt path)
  Location of icon files. Default: none. Must be set.
Cd ispell_path( Vt path)
  Location of Ispell Binary (backwards compatibility only).
Cd log_dir( Vt path)
  Location of log files. Default: none. Must be set.
Cd pid_dir( Vt path)
  Location for PID files of prayer and prayer-session master processes. Default: none. Must be set.
Cd sendmail_path( Vt path)
  Location of sendmail binary or drop in replacement such as Exim. Default: /usr/lib/sendmail.
Cd socket_dir( Vt path)
  Location for unix domain sockets which connect ( prayer 8 to prayer-session(8)).
Cd socket_split_dir( Vt boolean)
  Split socket directory into 64 subdirs keyed on first letter of sessionID. It is possible to switch back and forth without moving sockets or killing sessions, since prayer 8 tries both variants. In effect, this setting merely controls where prayer-session 8 creates the socket files. Default: false.
Cd init_socket_name( Vt string)
  Name of Unix domain socket (in
.Cd socket_dir ) No used for initial handshake between prayer and prayer-session processes when a user logs in. Default: none. Must be set.
Cd ssl_session_dir( Vt path)
  Location of the SSL session cache database. Default: none. Must be set, even if the SSL session cache is disabled.
Cd static_dir( Vt path)
  Location of other static files (CSS). Default: none. If unset, Prayer will not serve CSS files.
Cd tmp_dir( Vt path)
  As the directory both daemons chdir(2) to at startup, it is where temporary files, such as attachments and folders in transist during upload and download operations, are written. Core files also end up here. Default: none. Must be set.

    Defaults for user preferences

Cd confirm_logout( Vt boolean)
  Confirmation dialogue when user logs out. Default: true.
Cd confirm_expunge( Vt boolean)
  Confirmation dialogue when user hits expunge. Default: false.
Cd confirm_rm( Vt boolean)
  Confirmation dialogue when user deletes mail folder or directory. Default: true.
Cd default_domain Vt( string)
  Default domain for outgoing mail. Defaults to
.Cd hostname No setting.
Cd expunge_on_exit( Vt boolean)
  Expunge deleted messages from inbox automatically on logout. Default: false.
Cd html_inline( Vt boolean)
  Show text/html bodyparts inline. Content is scrubbed to remove dangerous tags. text/html will be displayed in preference to text/plain if this is set Default: true.
Cd html_remote_images( Vt boolean)
  Show remote images automatically. If this is not set, "Show unsafe images" links will appear on pages showing HTML mail. Default: false.
Cd html_inline_auto( Vt boolean)
  Same as above for text/* bodyparts which start "<HTML>" (case-independent!) Does anyone other than spammers actually use this? Default: true.
Cd ispell_language( Vt string)
  Language for ispell. Default: british .
Cd msgs_per_page( Vt number)
  Number of messages per screen on message list screen. Default: 12.
Cd msgs_per_page_max( Vt number)
  Maximum value that users are allowed to set
.Cd msgs_per_page No to. Default: 50.
Cd msgs_per_page_min( Vt number)
  Minimum value that users are allowed to set
.Cd msgs_per_page No to. Default: 4.
Cd abook_per_page( Vt number)
  Number of addressbook entries per page on address book list screen. Default: 12.
Cd abook_per_page_max( Vt number)
  Maximum value that users are allowed to set
.Cd abook_per_page No to. Default: 50.
Cd abook_per_page_min( Vt number)
  Minimum value that users are allowed to set
.Cd abook_per_page No to. Default: 4.
Cd maildir( Vt string)
  Mail directory in user’s account. Default: . Typically needed with uw-imap. Typically not needed with e.g. Dovecot or Courier.
Cd suppress_dotfiles( Vt boolean)
  Supress dotfiles from directory listing. Default: true.
Cd postponed_folder( Vt string)
  Name of the folder where messages to be sent later, a.k.a. drafts, are stored. Default: postponed-msgs .
Cd sent_mail_folder( Vt string)
  Name of folder for sent mail. Default: sent-mail .
Cd small_cols( Vt number)
  Width of small compose textarea in columns. Default: 80.
Cd small_rows( Vt number)
  Height of small compose textarea in lines. Default: 18.
Cd large_cols( Vt number)
  Width of large compose textarea in columns. Default: 80.
Cd large_rows( Vt number)
  Height of large compose textarea in lines. Default: 32.
Cd sort_mode( Vt string)
  Default Sort mode for mailbox list. One of ARRIVAL, DATE, FROM, TO, CC, SIZE, SUBJECT, REFERENCES, ORDEREDSUBJECT. Default: ARRIVAL is most efficient, and recommended.
Cd sort_reverse( Vt boolean)
  Favour reverse sort rather than normal sort order? Default: false.
Cd abook_sort_mode( Vt string)
  Default Sort mode for addressbook list. One of: ORDERED, ALIAS, NAME, COMMENT, ADDRESS. Default: ORDERED.
Cd abook_sort_reverse( Vt boolean)
  Favour reverse sort rather than normal sort order? Default: false.
Cd line_wrap_len( Vt number)
  Wrap lines at this many characters. Default: 76.
Cd line_wrap_advanced( Vt boolean)
  Enable advanced line wrap options? Default: false.
Cd line_wrap_on_reply( Vt boolean)
  Line wrap automatically on reply. Default: true.
Cd line_wrap_on_spell( Vt boolean)
  Line wrap automatically on spell check. Default: true.
Cd line_wrap_on_send( Vt boolean)
  Line wrap automatically on send. Default: true.
Cd preserve_mimetype( Vt boolean)
  Send message Content-Type through to browser. If false, Content-Type is replaced with application/octet-stream’ which should force download to local disk, bypassing any automatic processing of bodyparts by the User-Agent. Unclear at the moment whether we need to do this, or whether this should be done selectively based on the User-Agent. Default: true.
Cd use_sent_mail( Vt boolean)
  Make the"Save copy" checkbox on the compose screen checked default. Default: true.
Cd use_mark_persist( Vt boolean)
  Use persistent mark for aggregate operations. Default: false.
Cd use_search_zoom( Vt boolean)
  Zoom automatically after sucessful search Default: true.
Cd use_agg_unmark( Vt boolean)
  Unmark messages after sucessful aggregate operation. Default: true.
Cd use_icons( Vt boolean)
  Use icons: may be overriden by value of User-Agent. Default: true.
Cd use_welcome( Vt boolean)
  Enable welcome screen . Default: true.
Cd use_tail_banner( Vt boolean)
  Duplicate banner icons (toolbar) at the bottom of the Message screen. Default: true.

    Hidden preferences

The following options are internally handled as user preferences, but the Preferences screen no longer provides any means for changing them.
Cd use_cookie( Vt boolean)
  Use HTTP cookie for Session-ID, if the browser supports cookies If disabled, or user rejects the cookie, then the session-ID is stored in the URL. Default: true.
Cd use_substitution( Vt boolean)
  Use page substiution rather than HTTP redirects. Faster, but the URLs that are generated are less predictable. Page substitution and browser history mechanism don’t coexist well at the moment (Prayer would need to cache final page value for each substiution event).

Default: true.

Cd use_http_1_1( Vt boolean)
  Allow HTTP/1.1, if the browser supports it. Default: true.
Cd use_pipelining( Vt boolean)
  Allow HTTP/1.1 pipelining, if the browser supports it. Default: true.
Cd use_persist( Vt boolean)
  Allow persistent HTTP/1.1 and HTTP/1.0 persistent connections, if the browser supports them. Default: true.
Cd use_short( Vt boolean)
  Allow short URLs, if the browser supports them. Default: true.
Cd use_gzip( Vt boolean)
  Allow gzip compression, if the browser supports it. Default: true.


prayer(8), prayer-session(8)


This manual page was put together by
.An Magnus Holmgren <> using documentation written by
.An David Carter <> .
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