diff --git a/FAQ.md b/FAQ.md
index a9b5e7eb13..37d312a51e 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -723,6 +723,9 @@ but only for signed and encrypted messages because too many email servers have p
 Note that the most secure way to start an encrypted email exchange is by sending signed messages first.
 Received Autocrypt headers will be sent to the OpenKeychain app for storage on verifying a signature or decrypting a message.
 
+Although this shouldn't be necessary for most email clients, you can attach your public key to a message
+and if you use *.key* as extension, the mime type will correctly be *application/pgp-keys*.
+
 All key handling is delegated to the OpenKey chain app for security reasons. This also means that FairEmail does not store PGP keys.
 
 Inline encrypted PGP in received messages is supported, but inline PGP signatures and inline PGP in outgoing messages is not supported,