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PGP for Apple's MailGPGMail is a plug-in for Apple's Mail, providing a front-end to GPGMail extends Apple's Mail application and allows you to read and send PGP authenticated and/or encrypted messages. You can use GPGMail for plain text and MIME messages, following RFC 3156. GPGMail does not contain any encryption code: it is a client to GPGMail is a complete hack, relying on Mail's private internal API. Use it at your own risks!
GPGMail has been localized in 9 different languages, thanks to contributors: it is distributed in English, Spanish, Japanese, French, German, Danish, Korean, Swedish and Italian!
Information on this page includes:
FeaturesOnce started, Mail has a new submenu, PGP, in its Message menu, containing 4 items:
Mail also has a new Preferences panel in which you can set:
 In the Composer window, you can also add two toolbar items (by customizing the toolbar) to set the encryption (on/off) and add or not your PGP signature; you can also use menu items PGP/Encrypt New Message and PGP/Sign New Message. When you compose a new message, you can sign it (you will be asked for your identity passphrase), and/or you can encrypt it. Note that encryption/signature is applied on the whole message.  GPGMail can use two different formats for encryption/signature: if your message consists only of plain text (no attachments, no rich text attributes like bold, italic, etc.), GPGMail will use the old PGP format, with in-line -----PGP----- armored signature/encryption. In the other case, it will use the new OpenPGP/MIME format, with MIME attachments, which is not recognized by some mail agents like Outlook/Entourage/Eudora, but welcomed by Sylpheed, Mulberry and others. If you prefer GPGMail to always use the OpenPGP/MIME format, then quit Mail, launch Terminal, type When you browse through messages, GPGMail can operate automatically, or on-demand. In automatic mode, it tries to authenticate or decrypt the currently selected message; in manual mode, you click on a button/menu to decrypt or authenticate the currently selected message; you can also use the contextual menu. If you've set GPGMail to automatically authenticate messages and you don't want to be bothered by messages telling you that the message has be successfully authenticated, and would prefer to be warned only of invalid signatures, then use the following user default: Encryption/decryption of plain text and MIME messages works.
Note that there is a hidden user default, Decryption of HTML messages works too, if there's a plain text alternative, but you need to tell Mail to display the plain text alternative after you decrypted the message (menu Message/Show/Plain Text Alternative). Don't expect better support in the future! If you allow passphrase cacheing, passphrase is stored in cache during a small amount of time (default is 60 seconds): if it has not been used during this time, cache is cleared. Current limitations
RequirementsYou need MacOS X 10.1.x or 10.2.x; GPGMail will not work as-is on other OS versions, because the internals of Apple's Mail changes on every revision... You need a You can use MacGPG distribution, available at MacGPG web site.
LicenseStéphane Corthésy makes this software available for anyone to use, under the terms of this Open Source License. GPGMail is ©copyright 2000-2002 Stéphane Corthésy. I reserve all rights to this piece of software. I take no responsibility for any damage this software, through omission or error, might cause. This software is provided "as is" and with no warranty. FeedbackAs usual, I welcome feedback on this piece of code. If you have bug reports, suggestions or, even better, patches for GPGMail, please send an e-mail to gpgmail@sente.ch My PGP key is available from the following keyserver (use If you like it, tell it to me, and to Apple, this way they will (perhaps...) help me to port it to future MacOS X releases. GPGMail is free software, but if you want to give something... well, send me a postcard for my birthday (September 22nd) ;-) Mailing-listFollowing suggestions from users, I set up a mailing list, gpgmail-users@sente.ch. It is intended to be a very low traffic mailing list, mainly used by me to announce news on GPGMail development. Anyone can subscribe. Archives can be consulted on-line. Note that you may post messages too, if you want to exchange opinions/ideas on GPGMail with other users. Release Notes
(Jun 23rd, 2002) GPGMail Release 0.5.3 (v20):
(Nov 22nd, 2001) GPGMail Release 0.5.2 (v13):
(Sep 8th, 2001) GPGMail Release 0.5.1 (v8):
(Feb 7th, 2001) GPGMail Release 0.5 (v4): initial release, for MacOS X Server 1.x and MacOS X Public Beta. Known bugs
Ideas for future developments
DownloadThe source code for GPGMail can be downloaded from Sen:te's FTP server, either in .dmg format or in GZIP compressed TAR files that can be decoded with the command Packages are PGP-signed: to verify them, download also the accompanying detached signature and verify the package integrity. You can use GPGDropThing to do this, or in the Terminal, type: gpg --verify package.dmg.asc
My key ID is
Installation
Frequently Asked QuestionsI wrote a little FAQ to help you solve most common problems related to GPGMail and gpg. Please, read it! References and further readings
"GnuPG" is Copyright 1998-2002 Free Software Foundation, Inc. ThanksThanks to Michel Poulain for the artwork (icons & web site images) Thanks to all beta-testers and users Thanks to translators: Sergio Rodríguez Concha (Spanish), Michel Poulain (French), Tomio Arisaka (Japanese), Hauke Müller (German), Thomas Dyhr (Danish), Sangduk Park (Korean), Daniel Aarno (Swedish), Filippo Stefanelli (Italian) Special thanks to Tomio for numerous patches and Japanese support (http://www.max.hi-ho.ne.jp/tomio-a/GPGMail.html) Software LibraryMore Mac OS X, WebObjects or OPENSTEP software to download from Sen:te More Mail plug-ins developed by other people:
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(September 10, 2002) GPGMail Release 0.5.4 (v22) is currently available.
