gpg-mailgate is a content filter for Postfix that automatically encrypts unencrypted incoming email using PGP or S/MIME for select recipients. It is also able to decrypt incoming PGP mails.

For installation instructions, please refer to the included INSTALL file.

• Correctly displays attachments and general email content; currently will only display first part of multipart messages
• Public keys are stored in a dedicated gpg-home-directory
• Encrypts both matching incoming and outgoing mail (this means gpg-mailgate can be used to encrypt outgoing mail for software that doesn't support PGP or S/MIME)
• Decrypts PGP encrypted mails for present private keys (but no signature check and it does not always work with PGP/INLINE encrypted mails)
• Easy installation
• gpg-mailgate-web extension is a web interface allowing any user to upload PGP keys so that emails sent to them from your mail server will be encrypted (see gpg-mailgate-web directory for details)
• people can submit their public key like to any keyserver to gpg-mailgate with the gpg-mailgate-web extension
• people can send an S/MIME signed email to [email protected] to register their public key
• people can send their public OpenPGP key as attachment or inline to [email protected] to register it

This is forked from the original project at http://code.google.com/p/gpg-mailgate/

This is a combined work of many developers and contributors:

• mcmaster [email protected]
• Igor Rzegocki [email protected] - GitHub
• Favyen Bastani [email protected] - GitHub
• Colin Moller [email protected] - GitHub
• Taylor Hornby [email protected] - GitHub
• Martin (uragit) [email protected] - GitHub
• Braden Thomas - BitBucket
• Bruce Markey - GitHub
• Remko Tronçon - GitHub
• Kiritan Flux GitHub
• Fabian Krone [GitHub] (https://github.com/fkrone/gpg-mailgate)

• rename from gpg-mailgate to openpgp-s-mime-mailgate or something.....
• find a better solution for an own user instead of the user nobody
• make PGP/INLINE decryption more reliable