2.1   Server Options (backends.php)

The 'format' quota option has been removed.

The 'cache_lifetime' option is now honored for the 'cache' and 'hashtable' caching backends.

The 'interval' parameter has been added to the quota configuration.

The 'lmtp' parameter has been added to the smtp configuration.

2.2   Configuration Options (conf.php)

The following options have been added:

$conf['compose']['htmlsig_img_size']
$conf['compose']['link_attach_size_hard']
$conf['contactsimage']['backends']
$conf['maillog']['driver']

The following options have been removed:

$conf['compose']['ac_threshold']
$conf['compose']['convert_to_related']
$conf['maillog']['use_maillog']

The default value for the following options have been changed:

$conf['pgp']['keylength']

2.3   Hooks (hooks.php)

The following hooks have been added:

compose_addr

2.4   MIME Viewer Options (mime_drivers.php)

The 'pgp_inline' config parameter has been added to the plaintext driver. The 'thumbnails_dataurl' config parameter has been added to the images driver.

2.5   Permissions

The 'max_bodysize' permission has been added.

2.6   Preferences (prefs.php)

The following preferences have been added:

signature_show_compose

The following preferences have been removed:

default_msg_charset
mail_domain
mimp_download_confirm
mimp_inline_all
mimp_preview_msg
pgp_scan_body

The default value for the following preferences have been changed:

ckeditor_buttons

2.7   API Changes

These API calls have been changed:

- mailboxList

  Added the 'subscribed' return value.

3.1   Hooks (hooks.php)

The 'trailer' hook now has two additional parameters in addition to the previously existing $html parameter: $identity and $to. Further details on the content of these parameters can be found in hooks.php.dist.

4.1   Server Options (backends.php)

Sorting on non-IMAP servers, or IMAP servers that do not support the SORT extension, has been disabled by default in IMP 6.1. To restore the old behavior (NOT RECOMMENDED), see the 'sort_force' option in config/backends.local.php.

The 'debug' option has been added to the SMTP configuration.

IMAP/POP caching can now be done using database backends (see documentation for the 'cache' parameter).

The following quota drivers have been removed:

Command
Maildir
Mdaemon
Mercury32
Sql

4.2   Configuration Options (conf.php)

The $conf['user']['allow_folders'] option has been removed. This can now be set per-backend using the Horde permissions system.

The $conf['server']['fixed_folders'] option has been removed. Preventing actions on a specific mailbox can be controlled via native IMAP ACLs or, alternatively, by the 'mbox_acl' hook.

The $conf['user']['autocreate_special'] option has been removed. This can now be set on a per-backend basis in config/backends.local.php ('autocreate_special' option).

The $conf['msgsettings']['filtering'] and $conf['msgsettings']['replacement'] options have been removed. This feature has been moved to the 'msg_filter' hook.

The following spam-reporting options have been removed and can now be configured per-backend in config/backends.local.php:

$conf['notspam']['email']
$conf['notspam']['email_format']
$conf['notspam']['program']
$conf['notspam']['reporting']
$conf['notspam']['spamfolder']
$conf['spam']['email']
$conf['spam']['email_format']
$conf['spam']['program']
$conf['spam']['reporting']
$conf['spam']['spamfolder']

The following options have been added:

$conf['pgp']['keylength']

The following options have been removed:

$conf['compose']['link_all_attachments']

4.3   Hooks (hooks.php)

The 'attach_body_check' hook has been added. This hook handles the attachment word checking code that previously was provided as an example in the 'pre_sent' hook.

The 'compose_attach' hook has been removed and replaced by the 'compose_attachment' hook. Both hooks are designed for the same purpose; however, the arguments have been completely changed so it is safest to entirely deprecate usage of the previous hook.

The 'mbox_readonly' hook has been removed. Mailbox permissions can instead be controlled via native IMAP ACLs or, alternatively, by the 'mbox_acl' hook.

The 'mbox_special' hook has been removed. Additional special mailboxes can now be defined per-backend in config/backends.local.php.

The 'mailboxarray' and 'msglist_flags' hooks have been altered to remove the second argument ($mode). If the current view mode is needed, it can be obtained via a call to $GLOBALS['registry']->getView().

The 'spam_email' hook has been removed. This configuration can now be defined per-backend in config/backends.local.php.

The $html argument to the 'trailer' hook has been added.

The following hooks have been added:

mbox_acl
msg_filter

The following hooks have been removed:

dimp_messageview
dimp_previewview
mimp_advanced
signature

4.4   MIME Viewer Options (mime_drivers.php)

Thumbnails can now be disabled for images and PDF attachments.

Thumbnails are now automatically generated for video attachments if the ffmpeg binary is present on your system. This is enabled by default.

4.5   Permissions

IMP permissions are now applied per backend. To upgrade existing permissions, an admin needs to run the following script:

bin/imp-admin-upgrade --task=backend_perms

4.6   Preferences (prefs.php)

The default values for these preferences have been changed:

request_mdn

The following preferences are no longer used and may be safely removed from your preference backend (only after all users have logged in - these preferences MAY be used to automatically upgrade to new preferences when a user logs into IMP 6 for the first time):

compose_bcc
compose_cc
link_attach

4.7   API Changes

These API calls have been added:

- getMaillog
- getMaillogChanges
- logMaillog

5.1   Server Options (backends.php)

The 'namespace' option now requires the namespaces to be in the UTF-8 charset, not UTF7-IMAP.

The 'smtphost' and 'smtpport' options have been removed. They have been replaced by the 'smtp' option, which allows ALL available SMTP configuration options to be overriden.

The 'admin' option has been changed: optional configuration parameters should live within the base 'admin' array rather than a 'params' array within the base.

5.2   Configuration Options (conf.php)

The $conf['fixed_folders'] option now requires the mailboxes to be in the UTF-8 charset, not UTF7-IMAP.

The $conf['compose']['link_attach_size_limit'] option was added.

The $conf['print']['add_printedby'] option was removed and replaced by the 'add_printedby' preference.

The $conf['user']['select_sentmail_folder'] option was removed. To prevent changing the sentmail mailbox, the 'sent_mail_folder' preference should be locked instead.

The following configuration options were removed:

$conf['dimp']['viewport']['buffer_pages']
$conf['dimp']['viewport']['viewport_wait']

5.3   MIME Viewer Options (mime_drivers.php)

The 'safe_addrs' option has been removed from the Images driver config. To set the default list of e-mail addresses that should be considered "safe", the 'image_replacement_addrs' preference can now be used.

5.4   Hooks (hooks.php)

The 'mbox_sort' and 'mbox_special' hooks have been added.

The 'dimp_addressformatting' hook has been removed.

The $action parameter for reporting not spam message to the 'spam_email' and 'post_spam' hooks has been changed from 'ham' to 'innocent'.

5.5   Preferences (prefs.php)

The default values for these preferences have been changed:

drafts_folder
sent_mail_folder
spam_folder
trash_folder

The following preferences are no longer used and may be safely removed from your preference backend (only after all users have logged in - these preferences MAY be used to automatically upgrade to new preferences when a user logs into IMP 6 for the first time):

dimp_qsearch_field
dimp_show_preview
dimp_splitbar
dimp_splitbar_vert
dimp_toggle_headers
dynamic_view
image_addrbook
move_ham_after_report
sig_first
stationery

The 'cursor_compose' preference removed the 'sig' option. Existing preferences will automatically be converted to 'bottom'.

The 'save_attachments' preference removed the 'prompt_yes' and 'prompt_no' options. Existing preferences will automatically be converted.

The 'add_printedby', 'image_replacement_addrs', 'reply_charset', and 'reply_strip_sig' preferences were added.

The 'forward_default' preference now contains the 'editasnew' option.

5.6   API Changes

• copyMessages

  The $mailbox and $target parameters are now required to be UTF-8 strings.

• createFolder

  This call has been removed (replaced with 'createMailbox').

• deleteMessages

  The $mailbox parameter is now required to be a UTF-8 string.

• flagMessages

  The $mailbox parameter is now required to be a UTF-8 string.

• folderlist

  This call has been removed (replaced with 'mailboxList').

• moveMessages

  The $mailbox and $target parameters are now required to be UTF-8 strings.

• searchMailbox

  The $mailbox parameter is now required to be a UTF-8 string.

5.7   Compose: Linked Attachments

Linking attachments is no longer a user-configurable action. If enabled, ALL attachments are now linked unless the size of the attachment is less than $conf['compose']['link_attach_threshold'].

6.1   Configuration (conf.php)

The $conf['spam']['email_format'] and $conf['notspam']['email_format'] configuration options have been added.

7.1   Preferences (prefs.php)

The 'delhide_trash' preference has been added.

8.1   Preferences (prefs.php)

The 'delete_mark_seen' preference has been added.

9.1   Preferences (prefs.php)

The 'reply_lang' preference has been added.

10.1   MIME Viewer Options (mime_drivers.php)

The 'allthumbs' option has been removed from the HTML driver. Image thumbnail previews are now always shown if an image conversion utility is present on the system.

11.1   Configuration Options (conf.php)

The 'allow_resume_all' option has been removed. Only messages specifically marked as drafts can be resumed; however, all messages are given the option to "Edit As New".

12.1   HTML GUI editor

IMP only supports the CKeditor javascript HTML rich text editor. Xinha is no longer supported.

Button configuration is now stored in the prefs value 'ckeditor_buttons'.

12.2   Server Options (backends.php; OLD servers.php)

The format of servers.php has changed and has been renamed to backends.php.

The 'realm' option has been removed. Altering usernames at runtime should instead by accomplished by using Horde's 'authusername' and/or IMP's 'preauthenticate' hooks.

12.3   Configuration Options (conf.php)

Configuration relating to displaying the terms of agreement, GnuPG, OpenSSL, spellchecking, and login redirection have been moved to Horde.

The 'show_preview' option has been removed; enabling previews is now handled by the 'show_preview' preference.

The 'allow_resume_all_in_drafts' option has been removed; all messages that appear in the configured Drafts mailbox are now always allowed to be resumed.

The 'css_files' configuration option for the dynamic (dimp) display has been removed. Equivalent behavior can now be found in the Horde-wide 'cssfiles' hook.

The 'max_from_chars' and 'max_subj_chars' configuration options for the minimal (mimp) display have been removed.

The following configuration options have been removed:

allow_receipts
append_trailer
cache_folders
limit_factor
prepend_header
show_account_colors
size_limit
sort_limit

12.4   Preferences (prefs.php)

The 'sending_charset' and 'time_format' preferences have been moved to Horde.

The following preferences are no longer used and may be safely removed from your preference backend:

attachment_display
auto_delete_drafts
delete_attachments_monthly
delete_sentmail_monthly
dimp_login_view
disposition_request_read
disposition_send_mdn
fckeditor_buttons
fetchmail_link
fetchmail_menu
filter_on_sidebar
forward_bodytext
image_addrbook
image_replacement
nav_audio
nav_expanded_sidebar
nav_popup
purge_sentmail
purge_spam
purge_trash
use_vinbox
use_vtrash
vinbox_id
vtrash_id

12.5   Hooks (hooks.php)

The format of hooks.php has changed. See horde/docs/UPGRADING for more information.

The 'vinfo' hook has been removed. Use Horde's 'authusername' and/or IMP's 'preauthenticate' hooks instead.

The 'msglist_format' hook has been removed. X-Priority header handling is now handled in the core IMP code. Attachment icon display is now handled by the 'atc_flag' preference. The 'msglist_flags' hook is now used to dynamically set flags on messages.

12.6   Custom Message Headers (OLD header.php)

The header.php configuration file has been removed. Setting custom headers is now done in the 'pre_sent' hook.

12.7   Custom Message Trailers (OLD trailer.txt)

The trailer.txt file has been removed. Setting message trailers is now done in the 'trailer' hook.

12.8   Fetchmail

All code relating to fetchmail has been removed.

12.9   Flags

The list of available IMAP Flags/Keywords is now configurable via the 'msgflags' preference.

The Answered, Deleted, and Draft IMAP flags are no longer user settable by default - these flags have special meanings and are automatically handled by the various message action functions instead.

12.10   Menu

The dynamic view (DIMP) no longer supports the 'action' parameter located in config/menu.php.

12.11   Portal

Portal rendering has been moved to Horde - config/portal.php is no longer needed or used.

13.1   SQL Backend

An SQL table has been added that can be used to track sent messages. This is necessary to provide users with the "favourite recipients" address book, and for message rate throttling.

Execute the provided SQL script to add the table to your database, e.g.:

mysql --user=root --password=<MySQL-root-password> <db name> < scripts/sql/imp.sql

13.2   Unified IMAP Quota Driver

Separate quota drivers for Cyrus and Courier servers are no longer necessary. These drivers have been replaced by a generic IMAP driver that should also be suitable for other IMAP servers that support the QUOTA extension. Update config/servers.php and change the 'quota' => 'driver' setting to 'imap'.

13.3   Application Hooks

All hooks that are specific to IMP have been moved from the horde/config/hooks.php file. Move your existing IMP Hooks from there to imp/config/hooks.php.

13.4   User-Defined Mailbox Icons

The usage of the hook _imp_hook_mbox_icons() has changed. If you use this hook, make sure you change your implementation so it returns the correct value.

13.5   Changed Preferences

The default values for the mailbox preferences 'sent_mail_folder', 'drafts_folder', and 'trash_folder' have been changed and localized. Use the old values to prohibit the creation of duplicate mailboxes for users that didn't explicitly set the mailboxes in their preferences.

The following preferences are no longer used and may be safely removed from your config/prefs.php file and your preferences backend:

'auto_expand'
'num_words'

The 'mail_hdr' preferences has been moved from the identities to a regular preference. Existing user preferences are no longer used and have to be re-created by the users.

13.6   New Message List Format Hook

The new hook _imp_hook_msglist_format() has been added which allows the formatting of a message entry in the mailbox message list to be altered at the time the list is created. This hook has made the following configuration options obsolete:

$conf['mailbox']['show_attachments']
$conf['mailbox']['show_xpriority']

If you wish to continue using the functionality previously provided by these options, you should activate the msglist_format hook in config/conf.php. The sample hook contained in config/hooks.php contains the code necessary to replicate the previous behavior.

13.7   Spell Checking

The pspell driver is no longer supported since it does not work with HTML messages. If using pspell, you must upgrade to aspell version 0.60+.

13.8   Javascript HTML Editor

Support has been added for FCKeditor as an option for the javascript HTML editor available on the compose page. You must have Horde 3.2 or later installed to use this editor.

14.1   Automatic Namespace Detection

The namespace, hierarchies, folders, delimiter, and dotfiles parameters were removed from config/servers.php. Namespaces are now automatically configured pursuant to RFC 2342.

If using the UW IMAP daemon, you may notice a bunch of additional namespaces that were not displayed before as well as the ability of the user to view all files that live in their home directory via the folders screen. Information on how to correct your IMAP server configuration can be found at

http://wiki.horde.org/ImpUWIMAPNamespaces

14.2   User-Defined Headers

The config/headers.txt file has been removed and replaced by config/headers.php. Any user-defined headers should be migrated to this file. The new file has the advantage of allowing any valid PHP expression to be executed at run-time when generating the headers. See the top of the headers.php file for the new format required.

14.3   Removed Preferences

The following preferences are no longer used and may be safely removed from your config/prefs.php file and your preferences backend:

'disposition_request_delivery'
'wrap_width'

14.4   Virtual Folders

The format for saved Virtual Folders has changed. To convert to the new format you must run the script located at scripts/upgrades/convert_vfolders.php.