From c02f68cdb37cb22a0b39ec0b221cce34d88853ed Mon Sep 17 00:00:00 2001
From: smargold476 <105579587+smargold476@users.noreply.github.com>
Date: Fri, 8 Jul 2022 17:17:25 +0200
Subject: [PATCH] Update `faq.md` (#2677)

---
 docs/content/faq.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/docs/content/faq.md b/docs/content/faq.md
index 5c12d0b3..a4419971 100644
--- a/docs/content/faq.md
+++ b/docs/content/faq.md
@@ -141,6 +141,8 @@ warning: do not list domain example.com in BOTH mydestination and virtual_mailbo
 
 Plus of course mail delivery fails.
 
+Also you need to define `hostname: example.com` in your docker-compose.yml and don't sepecify the `domainname:` at all.
+
 ### Why are SpamAssassin `x-headers` not inserted into my `subdomain.example.com` subdomain emails?
 
 In the default setup, amavis only applies SpamAssassin x-headers into domains matching the template listed in the config file (`05-domain_id` in the amavis defaults).