TODO ==== * Rename to 'mail' module? * Mailcap: open attachments in background. * Config for [sup-mail](https://packages.debian.org/stable/sup-mail). * [Archival](https://joeyh.name/blog/entry/moving_my_email_archives_and_packages_to_git-annex/)? * Increased security on smtp/imaps password storage: * https://github.com/sup-heliotrope/sup/wiki/Securely-Store-Password * http://serverfault.com/questions/149452/how-can-i-use-fetchmail-or-another-email-grabber-with-osx-keychain-for-authent * http://mah.everybody.org/docs/mail/fetchmail_check