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The GPG plugins (PGP/Core, PGP/Mime and PGP/Inline) provide digital signature and encryption features: - Checking signatures of received emails - Decrypting received emails - Sending signed and/or encrypted emails - Creating new key pairs easily - Optionally, caching your passphrase or using gpg-agent. S/MIME plugin handles S/MIME signed and/or encrypted mails.

This plugin enables vCalendar message handling like that produced by Evolution or Outlook, and handles webCal subscriptions.

Check all messages that are received from an IMAP, LOCAL or POP account for spam using Bsfilter.

This plugin enables reading application/ms-tnef attachments used by Microsoft Outlook.

Displays libravatar/gravatar profiles' images or a dynamically generated or predefined alternative. Libravatar federated user domains are also supported.

Geary is a mail client for GNOME 3

This plugin enables the viewing of PDF and PostScript attachments using the Poppler lib.

Warns when the user composes a message mentioning an attachment in the message body without attaching any files to the message.

This library implements DKIM (DomainKeys Identified Mail).

GNU Anubis is an outgoing mail processor. It goes between the MUA (Mail User Agent) and the MTA (Mail Transport Agent), and can perform on the fly various sorts of processing and conversion on the outgoing mail in accord with the sender's specified rules, based on a highly configurable regular expressions system. It operates as a proxy server, independently from mail user agents. GNU Anubis can edit outgoing mail headers, encrypt and/or sign mail with the GNU Privacy Guard, build secure SMTP tunnels (Simple Mail Transport Protocol) using the TLS/SSL encryption even if your mail user agent doesn't support it, or tunnel a connection through a SOCKS proxy server. --------* --------** ------*** | MUA | ---> | Anubis | ---> | MTA | --------- ---------- --------- * Mail User Agent (client) ** An outgoing mail processor and the SMTP tunnel. *** Mail Transport Agent (server)