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1 \input texinfo
2
3 @setfilename GPGOE
4
5 This file describes the GPGOE functions and the integration
6 in the Outlook Express mailer.
7
8 This file is free under the terms of the GNU General Public License v2.
9
10 Copyright (C) 2006, 2007 Timo Schulz
11
12 @settitle GPGOE - the GnuPG plug-in for Outlook Express
13
14 @section Requirements for GPGOE
15
16 First you need to have a working GnuPG installtion on the machine you
17 plan to install GPGOE. If you don't have GPG in your machine, please
18 visit http://www.gnupg.org and download the latest GPG version there.
19 It comes with a graphical installer so there is no need to do this
20 step manually.
21
22 You need at least Windows 2000/XP and at least Outlook Express 6.0
23 or higher. The plug-in will not work with earlier versions of Express.
24
25 @subsection Installation on Vista
26
27 Because of the nature of the plugin, it contains a lot of tricks
28 for the Express integration, it cannot be guranteed, that it works
29 on Vista in general or the Outlook Express version that comes
30 with Vista. Feedback on the use with Vista is welcome but the
31 adjustment, if possible at all will take a lot of time.
32
33 @section Installation of the Plug-in
34
35 It is always recommend to use the latest version of the plug-in. You
36 can download it from http://wald.intevation.org/projects/gpgoe.
37 Download the zip file with the binaries inside and unpack them in
38 a folder. All files need to be in the same folder, so if you change
39 the folder don't forget to move all files.
40
41 To activate the plug-in you need to start gpgoeinit.exe. You should
42 now see a little (lock) icon in the taskbar which indicates that the
43 plug-in is running. If you want to quit the program, double click on
44 the (lock) icon and confirm the unload.
45
46 Now the plug-in is active.
47
48 @section Integration into Outlook Express
49
50 You have to enable the "Encrypt" and "Sign" items in the
51 toolbar, in the "New Message" dialog to allow GPGOE to
52 encrypt and/or sign the message.
53
54 There are no new icons for the plug-in and this means you
55 can either use S/MIME or OpenPGP but never at the same time.
56 If you want to use S/MIME again, just unload the plugin (quit
57 gpgoeinit.exe).
58
59 @strong{It is very important to close Outlook Express before you
60 unload the plug-in}
61
62 @section How to use the plug-in
63
64 @subsection Encrypt a message
65
66 To encrypt a mail, you need to check the "Encrypt" toolbar button.
67 If you click the "Send" button the plug-in will try to map each email
68 address to a user-ID of an existing OpenPGP key. If no unresolved
69 recipients were found, the mail is encrypted and stored in the outbox
70 folder. If one or more recipients couldn't be mapped to a key, the
71 recipient dialog is shown to manually select the recipients.
72
73 @subsection Sign a message
74
75 To sign a message, you need to check the "Sign" toolbar button.
76 If you click the "Send" button, GPG will figure out the default
77 signing key and the plug-in openes a passphrase dialog to enter
78 your passphrase for this key. If you entered it and the passphrase
79 was correct, the plugin will sign the message and store it in
80 the outbox.
81
82 @subsection Sign and Encrypt a message
83 To sign and encrypt a message, you have to check both toolbar
84 buttons ("Sign" and "Encrypt"). The procedure is the same as
85 in encrypt-only when one or more email addresses couldn't be
86 mapped. Then the default key is used to sign the plaintext
87 before it is encrypted with the selected recipients.
88
89 @subsection Decrypt and/or verify a message
90 If you received an OpenPGP message, you can just double-click
91 the message to open it. The plug-in will figure out if it is
92 encrypted or signed and will start the correct procedures. For
93 decryption you need to enter your passphrase, otherwise the
94 verify dialog is shown which contains information about the
95 signature status.
96 You can also use the "Next" and "Previous" toolbar buttons to
97 jump to the next message or to go back to the previous. The plug-in
98 will figure out the message status and will take the needed steps.
99 If the message is neither signed nor encrypted, no action is performed.
100
101 @subsection Reply to an encrypted message
102 Newer versions of the plug-in provide a feature to decrypt the
103 message before the text is used in the reply mail. As a result,
104 the reply message will contain the plain text instead of the encrypted
105 GPG armored message.
106 This feature is automatically used whenever the user clicks on "Reply"
107 or "Reply All" in the Outlook main window. But only in the case, the
108 mail is actually encrypted. Optionally the plug-in will ask for a
109 key passphrase.
110
111 @section Additional information and limitations of the GPGOE plug-in
112
113 @itemize @bullet
114
115 @item
116 If you manually installed GPG and GPGoe, please make sure that
117 you installed GPG at a standard place or create at least the gpgBinary
118 registry entry. This is not needed if you use an automatic installer
119 like GPG4WIN.
120
121 @item
122 Due to the fact the plug-in uses the clipboard for data transfer,
123 the clipboard itself can be only of limited use to copy/paste messages
124 into the mailer window or elsewhere. Newer versions of the plug-in
125 save the original clipboard text before encryption/signing and the
126 text is restored after the GPG operation ends.
127
128 @item
129 The current version of the plug-in will NOT encrypt any attachments
130 which are attached to the message. You either need to encrypt them
131 before or send them in cleartext. For the file encryption it is
132 recommend to use GPGee or WinPT.
133
134 The same needs to be done when an encrypted mail with encrypted
135 attachments is in the inbox folder. You need GPGee or WinPT to
136 decrypt the saved file.
137
138 @item
139 Even so the plug-in supports native line endings, which means you
140 can properly exchange mails with Linux or Apple users, it is likely
141 that there are problems with the charset. Newer versions of the
142 plug-in try to handle UTF8 encoding correctly but even so it cannot
143 be 100% assured that the receiver can handle the text in all cases.
144
145 @item
146 If you want to import keys or attach keys to a mail, you have to
147 use an external key manager. WinPT is recommend in this case. It
148 contains features to send public keys to mail recipients and also
149 to export keys via the clipboard so you can easily paste the key
150 into the text body of the message. The current version of the
151 plug-in automatically uses WinPT for key import if the program
152 is available and running.
153
154 @item
155 Currently signing can be only done with the default signing key.
156 If you want to change the default signing key, you can use WinPT
157 to select a different key and then GPGOE will use this one.
158
159 @item
160 GPGOE is NOT able to handle PGP/MIME (RFC3156) style messages.
161 This means if you get such a message, the plug-in will not be
162 able to automatically decrypt it.
163 And due to the fact that the decrypted "attachment" will still
164 contain a lot of control and coding information, you cannot simply
165 decrypt it with WinPT/GPGee and use the output.
166
167 @end itemize
168
169 @bye

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