diff --git a/conf/.env b/conf/.env
index d6a0ee9..519c661 100644
--- a/conf/.env
+++ b/conf/.env
@@ -40,9 +40,9 @@ EXECUTIONS_DATA_MAX_AGE=168
 EXECUTIONS_DATA_PRUNE_MAX_COUNT=2000
 
 N8N_EMAIL_MODE=smtp
-N8N_SMTP_HOST=__MAIN_DOMAIN__
+N8N_SMTP_HOST=127.0.0.1
 N8N_SMTP_PORT=25
 N8N_SMTP_USER=__APP__
 N8N_SMTP_PASS=__MAIL_PWD__
-N8N_SMTP_SENDER=__EMAIL__
-N8N_SMTP_SSL=true
+N8N_SMTP_SENDER=__APP__@__MAIN_DOMAIN__
+N8N_SMTP_SSL=false
diff --git a/scripts/install b/scripts/install
index 96e4c3b..c90ba66 100755
--- a/scripts/install
+++ b/scripts/install
@@ -60,6 +60,9 @@ ynh_script_progression --message="Installing $app..." --weight=2
 pushd $install_dir
  	ynh_use_nodejs
 	ynh_exec_warn_less sudo -u $app env $ynh_node_load_PATH $ynh_npm install n8n@${n8n_version}
+	ynh_replace_string  --match_string="secure: config_1.default.getEnv('userManagement.emails.smtp.secure'),$" \
+	                    --replace_string="secure: config_1.default.getEnv('userManagement.emails.smtp.secure'), tls: {servername:'${main_domain}'}," \
+	                    --target_file="node_modules/n8n/dist/UserManagement/email/NodeMailer.js"
 popd
 
 chmod -R o-rwx "$install_dir"
diff --git a/scripts/upgrade b/scripts/upgrade
index f6868af..de817c7 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -83,6 +83,9 @@ ynh_script_progression --message="Installing $app..." --weight=2
 pushd $install_dir
  	ynh_use_nodejs
  	ynh_exec_warn_less sudo -u $app env $ynh_node_load_PATH $ynh_npm install n8n@${n8n_version}
+	ynh_replace_string  --match_string="secure: config_1.default.getEnv('userManagement.emails.smtp.secure'),$" \
+	                    --replace_string="secure: config_1.default.getEnv('userManagement.emails.smtp.secure'), tls: {servername:'${main_domain}'}," \
+	                    --target_file="node_modules/n8n/dist/UserManagement/email/NodeMailer.js"
 popd
 
 #=================================================