diff --git a/content/blog/mail_server_alpine_postfix_dovecot_tutorial/index.md b/content/blog/mail_server_alpine_postfix_dovecot_tutorial/index.md
index 24de61c..c8e4532 100644
--- a/content/blog/mail_server_alpine_postfix_dovecot_tutorial/index.md
+++ b/content/blog/mail_server_alpine_postfix_dovecot_tutorial/index.md
@@ -1899,6 +1899,9 @@ Dovecot their own log files.
 You may want to get your domain whitelisted on [dnswl.org](https://www.dnswl.org/), an email whitelist service where
 admins can submit their domain and IP address to indicate trustworthiness.
 
+Finally, you can [PGP-encrypt users' incoming mail with their public keys, much like
+Protonmail](/blog/pgp_encrypting_all_incoming_emails/).
+
 <!-- FOOTNOTES: -->
 
 [^server_trust]: This is only true to the extent that your server is not compromised. You could say there's an order of