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 b22ad3d..5c4e719 100644
--- a/content/blog/mail_server_alpine_postfix_dovecot_tutorial/index.md
+++ b/content/blog/mail_server_alpine_postfix_dovecot_tutorial/index.md
@@ -1773,6 +1773,9 @@ etc. The `sieve_after` option also exists, and works the same way.
 This is not the same as `sieve_default`, which is *overridden* by user sieve scripts and only executes when a user has
 no sieve script.
 
+You can review [this documentation](https://doc.dovecot.org/main/core/plugins/sieve.html) for a full list of Pigeonhole
+options.
+
 ## ManageSieve
 
 Users can configure their own user sieve scripts using a protocol called ManageSieve. Like how IMAP allows users to