On the GnuPG wiki's Web Key Directory (WKD) page, identify three desktop mail clients and two Android mail clients that support WKD, specifying their versions if mentioned. Also, list two mail service providers offering WKD support and their implementation dates, if available.
Navigate directly to 'https://wiki.gnupg.org/WKD'. Locate the section detailing 'Known mail clients with WKS Support' or similar and identify three desktop mail clients and their versions. Locate information on Android mail clients with WKD support and identify two, noting their versions. Find the section on 'Mail Service Providers offering WKD' and identify two providers along with their implementation dates. Compile all identified information into a concise answer.
List three desktop mail clients with WKD support and their respective versions (e.g., Thunderbird/Enigmail 2.0, KMail 5.6, Outlook with GpgOL 2.2.0 or 3.1.10, Claws Mail 3.18.0 / 4.0.0, Balsa (merged)). List two Android mail clients with WKD support and their respective versions (e.g., K9Mail with OpenKeyChain 5.1, FairEmail with OpenKeyChain 5.4). List two mail service providers with WKD support and their implementation dates (e.g., Forward Email (Since 2023-12-27), Posteo (Since 2016-12), Protonmail (Since 2018-11), netzguerilla (Since 2017-10-11), systemli.org (Since 2020-10-15), mailbox.org (claims, 2019 announcement), mail.de, Mailfence (Since 2021-11-18)). All information must be extracted from the specified GnuPG wiki page.