1 <?xml version="1.0" encoding="utf-8"?>
2 <section id="ch_plugins">
3 <title>Extending Claws Mail</title>
5 <section id="plugins_default">
6 <title>Provided plugins</title>
8 Claws Mail' capabilities are extended by plugins. It comes with
9 the plugins listed below included, all of which are built automatically
10 if the required libraries are present.
12 Plugins are installed in <filename class="directory"
13 >$PREFIX/lib/claws-mail/plugins/</filename> and have a suffix of
14 <quote>.so</quote>. To load a plugin go to
15 <quote>Configuration/Plugins</quote> and click the
16 <quote>Load Plugin</quote> button. Select the plugin that you want and
17 click <quote>Open</quote> button.
19 If you don't find the plugin you're looking for, it is possible that
20 your Operating System distribution provides it in a separate package.
21 In this case, search for the plugin in your package manager.
25 <term>Bogofilter</term>
28 The Bogofilter plugin comes with two major features:
30 The ability to scan incoming mail received from a POP, IMAP or LOCAL
31 account using Bogofilter. It can optionally delete mail identified
32 as spam or save it to a designated folder. Mail scanning can be turned
35 The ability for users to teach Bogofilter to recognise spam or ham.
36 You can train Bogofilter by marking messages as spam or ham from the
37 Message List contextual menu, or using the relevant toolbar button in
38 the main window or the message window (see
39 <quote>Configuration/Preferences/Customize toolbars</quote>). Messages
40 marked as spam are optionally saved to a designated folder.
42 Plugin preferences can be found in
43 <quote>Configuration/Preferences/Plugins/Bogofilter</quote>.
45 Bogofilter's advantage over Spamassassin is its speed.
47 Bogofilter is available from <ulink
48 url="http://bogofilter.sourceforge.net/"
49 >http://bogofilter.sourceforge.net/</ulink>.
54 <term>Clam Antivirus</term>
57 Enables the scanning of message attachments in mail received from a
58 POP, IMAP or LOCAL account using Clam AntiVirus. It can optionally
59 delete the mail or save it to a designated folder. Preferences can be
61 <quote>Configuration/Preferences/Plugins/Clam AntiVirus</quote>.
62 Clam AntiVirus is available from <ulink
63 url="http://clamav.sourceforge.net/"
64 >http://clamav.sourceforge.net/</ulink>.
69 <term>Dillo HTML Viewer</term>
72 Enables the viewing of HTML messages using the Dillo web browser,
73 version 0.7.0 or newer. It uses Dillo's <literal>--local</literal>
74 option by default for safe browsing. Preferences can be found in
75 <quote>/Configuration/Preferences/Plugins/Dillo Browser</quote>.
76 Dillo is available from <ulink url="http://www.dillo.org/"
77 >http://www.dillo.org/</ulink>.
82 <term>PGP/Core, PGP/Inline and PGP/MIME</term>
85 Handles PGP signed and/or encrypted mails. You can decrypt mails,
86 verify signatures or sign and encrypt your own mails. Uses GnuPG/GPGME,
87 <ulink url="ftp://ftp.gnupg.org/gcrypt/gpgme/"
88 >ftp://ftp.gnupg.org/gcrypt/gpgme/</ulink>.
93 <term>SpamAssassin</term>
96 The SpamAssassin plugin comes with two major features:
98 The ability to scan incoming mail received from a POP, IMAP or LOCAL
99 account using SpamAssassin. It can optionally delete mail identified
100 as spam or save it to a designated folder. Mail scanning can be turned
101 off, which is useful if your email is scanned on your server.
103 The ability for users to teach SpamAssassin to recognise spam or ham.
104 You can train SpamAssassin by marking messages as spam or ham from the
105 Message List contextual menu, or using the relevant toolbar button in
106 the main window or the message window (see
107 <quote>Configuration/Preferences/Customize toolbars</quote>). Messages
108 marked as spam are optionally saved to a designated folder.
110 Plugin preferences can be found in
111 <quote>Configuration/Preferences/Plugins/SpamAssassin</quote>.
113 SpamAssassin's advantage over Bogofilter is that it's not only a bayesian
114 filter, but it also performs various local and network tests to
117 SpamAssassin is available from <ulink
118 url="http://spamassassin.apache.org/"
119 >http://spamassassin.apache.org/</ulink>. Version 3.1.x or higher is
120 required to use the learning feature in TCP mode.
125 <term>Trayicon</term>
128 Places an icon in the system tray that indicates whether you have any
129 new mail. A tooltip also shows the current new, unread and total number
137 <section id="plugins_external">
138 <title>More plugins</title>
140 Other plugins have been written too, which are available as separate
141 downloads. At the time of this writing, there are a number of plugins
142 available at <ulink url="http://www.claws-mail.org/plugins.php"
143 >http://www.claws-mail.org/plugins.php</ulink>:
147 <term>Acpi Notifier</term>
150 Enables new mail notification via the LEDs found on some laptops like
151 Acer, Asus, Fujitsu and IBM laptops.
156 <term>AttachWarner</term>
159 Reminds you about possibly forgotten attachments. Checks for common
160 expressions found when attaching a file and warns you if no attachment
161 was added to the mail you're sending.
166 <term>AttRemover</term>
169 This plugin lets you remove attachments from emails.
174 <term>CacheSaver</term>
177 Saves the caches every 60 seconds (or user-defined period). It helps
178 avoiding the loss of metadata if your computer (<emphasis>or
179 Claws Mail!</emphasis>) crashes.
184 <term>etpan! Privacy</term>
187 Handles signature verification and decryption of encrypted messages in
188 S/MIME, OpenPGP and ascii-armored PGP formats. Doesn't handle
189 passphrases. The development of this plugin has been discontinued
190 because its functions are avaliable in the PGP plugins.
195 <term>Fetchinfo</term>
198 Inserts headers containing some download information, like UIDL,
199 Claws Mail' account name, POP server, user ID and retrieval time.
204 <term>GtkHtml Viewer</term>
207 Like Dillo, enables the viewing of HTML messages, but in a nicer way
216 Provides direct support for Maildir++ mailboxes. With this plugin you
217 can share your Maildir++ mailbox with other mailers or IMAP servers.
218 The development of this plugin has been discontinued. If you're
219 a developer and want to adopt it then don't hesitate to contact us.
224 <term>mailMBOX</term>
227 Handles mailboxes in MBox format.
235 Intended to extend the filtering possibilities of Claws Mail. It
236 provides a Perl interface to Claws Mail' filtering mechanism,
237 allowing the use of full Perl power in email filters.
242 <term>PDF Viewer</term>
245 This plugin provides direct rendering of PDF and PostScript attachments
246 in the Claws Mail message view. It also allows browsing, zooming and
247 displaying detailed information about such attachments.
255 Handles S/MIME signed and/or encrypted mails. You can decrypt mails,
256 verify signatures or sign and encrypt your own mails. Uses GnuPG/GPGME
257 and GpgSM, <ulink url="ftp://ftp.gnupg.org/gcrypt/gpgme/"
258 >ftp://ftp.gnupg.org/gcrypt/gpgme/</ulink>.
266 Assists in keeping the address book of a Windows CE device (Pocket
267 PC, iPAQ, Smartphone, etc.) in sync with Claws Mail' address book,
268 with respect to email addresses.
273 <term>vCalendar</term>
276 Enables vCalendar message handling like that produced by Evolution or
277 Outlook, and Webcal subscriptions.
285 Allows you to read your favorite newsfeeds in Claws. RSS 1.0, 2.0 and
286 Atom feeds are currently supported.
292 If you're a developer, writing a plugin to extend Claws Mail'
293 capabilities is probably the best and easiest solution. We will
294 provide hosting to your code, and will be glad to answer your questions
295 in the mailing-list or on the IRC channels,
296 <literal>#claws-mail</literal> on Freenode or IRCnet.
299 <section id="plugins_network">
300 <title>Network access from the plugins</title>
302 Some of the external plugins, for example RSSyl, vCalendar or GtkHtml
303 Viewer, need Internet access for their operations (retrieving feeds in
304 the case of RSSyl or vCalendar, and fetching images in the case of
305 GtkHtml Viewer). These plugins use the Curl library. Hence, if your
306 Internet access is restricted by a proxy, you will need to tell libCurl
307 to use this proxy. This is done by setting an environment variable,
308 <literal>http_proxy</literal>. For example,
309 <literal>http_proxy=http://user:passwd@myproxy.example.com:8080</literal>
310 will tell libCurl to connect to port 8080 of the machine
311 myproxy.example.com, with the user <quote>user</quote> and password
312 <quote>passwd</quote> to connect to the Internet.
314 You can either set this variable before starting Claws Mail, by
316 <command>http_proxy=http://user:passwd@myproxy.example.com:8080
317 claws-mail</command>, or set it in your
318 <filename>~/.bashrc</filename> file (or your shell equivalent), by
319 adding the following line<footnote><para>Other shells may have
320 diferent syntaxes, check your shell's manual page.</para></footnote>:
321 <command>export http_proxy=http://user:passwd@myproxy.example.com:8080</command>
322 (you'll have to reconnect to have it taken into account).