diff --git a/docs/ADR/003-mailserver.md b/docs/ADR/003-mailserver.md
index 2ac3aa5..3ac2f83 100644
--- a/docs/ADR/003-mailserver.md
+++ b/docs/ADR/003-mailserver.md
@@ -8,7 +8,7 @@ In progress
 
 Gandi free email will become a pay service in 2 month.
 
-In this condition it will be interesting to  study selfhosted mail solution.
+In this condition it will be interesting to study selfhosted mail solution.
 
 ### domain name
 
@@ -24,6 +24,17 @@ con:
 
 - need to progresively update every personal account
 
+### Container localisation
+
+on hetzner:
+
+- need to increase memory
+
+on homelab:
+
+- need to redirect all serveur flux to hetzner to be sure to be sure that mail will be send with hetzner IP (control PTR on this IP)
+- hetzner will be too a SPOF
+
 ### software choose
 
 mail server will run in nomad cluster.
@@ -35,5 +46,9 @@ mailu
 
 we will switch to another domain name on "https://www.bookmyname.com/": ducamps.eu""
 docker-mailserver will be more easier to configure because only one container to migrate to nomad
+for begining container will be launch on hetzner
 
 ## Consequences
+
+- need to buy a new domaine name and configure DNS
+- inprove memory on corwin (done)