diff --git a/README.md b/README.md
index cfd453ff..e34aeb12 100644
--- a/README.md
+++ b/README.md
@@ -38,8 +38,8 @@ A production-ready fullstack but simple containerized mail server (SMTP, IMAP, L
 
 ## :package: Included Services
 
-- [Postfix](http://www.postfix.org) with SMTP or LDAP authentication and support for [extension delimiters](https://docker-mailserver.github.io/docker-mailserver/latest/config/user-management/aliases/#address-tags-extension-delimiters-an-alternative-to-aliases)
-- [Dovecot](https://www.dovecot.org) with SASL, IMAP, POP3, LDAP, [basic Sieve support](https://docker-mailserver.github.io/docker-mailserver/latest/config/advanced/mail-sieve) and [quotas](https://docker-mailserver.github.io/docker-mailserver/latest/config/user-management/accounts#notes)
+- [Postfix](http://www.postfix.org) with SMTP or LDAP authentication and support for [extension delimiters](https://docker-mailserver.github.io/docker-mailserver/v13.3/config/user-management/#address-tags-extension-delimiters-as-an-alternative-to-aliases)
+- [Dovecot](https://www.dovecot.org) with SASL, IMAP, POP3, LDAP, [basic Sieve support](https://docker-mailserver.github.io/docker-mailserver/latest/config/advanced/mail-sieve) and [quotas](https://docker-mailserver.github.io/docker-mailserver/v13.3/config/user-management/#quotas)
 - [Rspamd](https://rspamd.com/)
 - [Amavis](https://www.amavis.org/)
 - [SpamAssassin](http://spamassassin.apache.org/) supporting custom rules
diff --git a/docs/content/config/advanced/ipv6.md b/docs/content/config/advanced/ipv6.md
index 77dfb0c9..7e9c904c 100644
--- a/docs/content/config/advanced/ipv6.md
+++ b/docs/content/config/advanced/ipv6.md
@@ -177,6 +177,12 @@ docker run --rm -d --network dms-ipv6 -p 80:80 traefik/whoami
 curl --max-time 5 http://[2001:db8::1]:80
 ```
 
+!!! warning "IPv6 gateway IP"
+
+    If instead of the remote IPv6 address, you may notice the gateway IP for the IPv6 subnet your DMS container belongs to.
+
+    This will happen when DMS has an IPv6 IP address assigned, for the same reason as with IPv4, `userland-proxy: true`. It indicates that your `daemon.json` has not been configured correctly or had the updated config applied for `ip6tables :true` + `experimental: true`. Make sure you used `systemctl restart docker` after updating `daemon.json`.
+
 !!! info "IPv6 ULA address priority"
 
     DNS lookups that have records for both IPv4 and IPv6 addresses (_eg: `localhost`_) may prefer IPv4 over IPv6 (ULA) for private addresses, whereas for public addresses IPv6 has priority. This shouldn't be anything to worry about, but can come across as a surprise when testing your IPv6 setup on the same host instead of from a remote client.