I'm interested in using Web Key Directory (WKD) for secure email. Can you explain its main benefits for users and list at least three email clients or software that support it?
Navigate to the 'WKD' page on the GnuPG wiki. Locate and read the 'for Users' section to identify the practical benefits of WKD. Navigate to the 'Implementations' section. List at least three email clients or software implementations mentioned that support WKD. Synthesize the benefits and the list of implementations into a concise answer.
The agent successfully navigates to the 'WKD' page. The agent successfully navigates to the 'for Users' section (or extracts information from it). The agent successfully navigates to the 'Implementations' section (or extracts information from it). State that WKD improves user experience for exchanging secure emails and files by making public keys easily discoverable via HTTPS, preserving privacy of email addresses, and allowing immediate encryption without manual key management or fingerprint checking. List at least three software implementations or email clients that support WKD (e.g., GnuPG, Thunderbird/Enigmail, KMail, Outlook with GpgOL, Claws Mail, Mailvelope, K9Mail with OpenKeyChain, FairEmail with OpenKeyChain).