diff --git a/Keyserver-less-OpenPGP.md b/Keyserver-less-OpenPGP.md
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--- a/Keyserver-less-OpenPGP.md
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@@ -1,31 +1 @@
-Warning: This does not discuss trust, only key discovery!
-
-# Opportunistic Key Discovery
-  * A: Send normal email with header ``OpenPGP: preference=signencrypt`` ([see Internet-Draft](https://tools.ietf.org/html/draft-josefsson-openpgp-mailnews-header-07))
-  * B: B parses header and now knows that A can do OpenPGP
-  * B: Next normal email is signed and contains the key as attachment
-  * A: A receives email, key is automatically imported and signature verified. Check that key corresponds to sig?
-  * A: 3rd email and all onward are encrypted+signed
-
-# Full Description
-We propose to enable the OpenPGP header by default for all outgoing emails to announce to recipients that you are capable of receiving OpenPGP protected emails.
-
-The default header should look like this: ``OpenPGP: preference=signencrypt``
-
-Always announcing that a sender is capable of receiving OpenPGP protected emails signals to the receiver to -- for the next email to this sender -- attach his/her public key and sign it.
-
-In K-9 Mail on Android we plan to import these attached keys automatically to opportunistically protect emails with OpenPGP.
-
-We propose this additional roundtrip with the header instead of always signing and attaching keys directly, because users which don't use OpenPGP are annoyed by weird attachments like signature.asc or 0x12345678.asc.
-
-We are not proposing to include a Key ID or URL in the header by default for all emails as this would leak additional data. Including a Key ID would leak information about the key if it's available on keyservers, including the URL does not allow to import something automatically as this introduced a synchronous connection to a webserver, which could be exploited for tracking users for example.
-
-[The "OpenPGP" mail and news header field](https://tools.ietf.org/html/draft-josefsson-openpgp-mailnews-header-07)
-
-Tracking in email client bug trackers:
-* [Enigmail](https://sourceforge.net/p/enigmail/bugs/627/)
-* KMail
-* gpg4o
-* GPGOL
-* GPGTools
-* r2mail2
+Superseded by https://github.com/autocrypt/autocrypt/
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