gpgmymail

Takes an email from stdin and encrypts it to stdout using the recipient's PGP key, provided as an argument when calling the script.

Leaves a X-gpgmymail-Status header on the email, which has the following statuses:

• entered - the email has entered the encryption function, but not been encrypted
• encrypted - the encryption function has encrypted the email

Written to be a Sieve filter to be used with sieve_extprograms. Can be used in a Sieve filter e.g.:

require ["vnd.dovecot.filter"];
filter "gpgmymail" "pid1@revsuine.xyz";

Will encrypt all incoming mail with the pid1@revsuine.xyz PGP key.

TODO link my blog post when I make it fully explaining how to use as Sieve filter.

I use this script on my own mail server so this should be maintained to work with the up-to-date versions of Python and python-gnupg

Requirements

• Python 3
• python-gnupg

Notes on Scope

Since this script is written to be used as a Sieve filter, no exclusion behaviour which is much better achieved with Sieve will be implemented, e.g. "do not encrypt emails from kate@gmail.com".

Credits

• Julian Klode for the original code
• revsuine for modifications to gpgmymail, mostly to make it work well with Thunderbird