diff --git a/conf/.env b/conf/.env
index f95d36b..2957ef8 100644
--- a/conf/.env
+++ b/conf/.env
@@ -10,8 +10,8 @@ SSH_SERVER_FINGERPRINT_RSA=__RSA_KEY__
 SSH_SERVER_FINGERPRINT_ED25519=__ED25519_KEY__
 SSH_SERVER_FINGERPRINT_ECDSA=__ECDSA_KEY__
 # SMTP's variables
-MAIL_SMTP_FROM=borgwarehouse@__DOMAIN__
-MAIL_SMTP_HOST=localhost
+MAIL_SMTP_FROM=borgwarehouse@__MAIN_DOMAIN__
+MAIL_SMTP_HOST=__MAIN_DOMAIN__
 MAIL_SMTP_PORT=25
 MAIL_SMTP_LOGIN=__APP__
 MAIL_SMTP_PWD=__MAIL_PWD__
diff --git a/scripts/_common.sh b/scripts/_common.sh
index b4d1a2f..b1923cd 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -6,6 +6,7 @@
 
 nodejs_version=18
 ssh_port=$(grep -P "Port\s+\d+" /etc/ssh/sshd_config | grep -P -o "\d+")
+main_domain=$(cat /etc/yunohost/current_host)
 
 rsa_key=$(ssh-keygen -lf /etc/ssh/ssh_host_rsa_key | awk '{print $2}')
 ed25519_key=$(ssh-keygen -lf /etc/ssh/ssh_host_ed25519_key | awk '{print $2}')